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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Call for Papers:</span></b></span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">*******************************************************************************</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">*** Rule Challenge @ RuleML+RR 2026 ***</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">*** 24-26 August 2026 ***</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">*** Vilnius, Lithuania ***</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">*******************************************************************************</span></font></div>
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<div style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:15px; margin-top:0px; margin-bottom:0px">
<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">The </span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">20th
International Rule Challenge</span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> is the </span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">premier
forum</span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> of</span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> the
10th International Conference on Rules and Reasoning (</span></font><a href="https://2026.declarativeai.net/ruleml-rr/" target="_blank" rel="noopener noreferrer" title="https://2026.declarativeai.net/ruleml-rr/
Cmd+Fai clic o tocca il collegamento per aprirlo"><font style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">RuleML+RR
2026</span></font></a><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">) </span><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">designed
to </span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">benchmark </span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">and</span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> validate</span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> innovative
rule-oriented tools, prototypes, and applications. It bridges the gap between theory and practice by fostering competition among solutions tailored to research, industry, and government.</span></font></div>
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<div style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:15px; margin-top:0px; margin-bottom:0px">
<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Participants are invited to showcase </span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">solutions</span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> </span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">to</span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> </span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">complex</span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">, </span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">real-world
problems</span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">, or </span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">drive
the community’s research agenda</span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> by proposing new open
challenges.</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Accordingly, submissions are welcome in two main categories:</span></font></div>
<ul style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:15px; background-color:transparent; margin-top:14pt; margin-bottom:14pt">
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<li style="margin-left:15px"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Challenge Proposals:</span></b></span><span style="background-color:rgb(255,255,255); font-size:11pt; font-family:Calibri,Helvetica,sans-serif"> Papers
defining rigorous benchmarks, industrial bottlenecks, or novel problems that require rule-based reasoning. Submissions must provide the necessary infrastructure for evaluation, including task descriptions, datasets, and success criteria, highlighting opportunities
for rule-based approaches to provide solutions.</span></span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Challenge
Solutions:</span></b></span><span style="background-color:rgb(255,255,255); font-size:11pt; font-family:Calibri,Helvetica,sans-serif"> </span><span style="background-color:rgb(255,255,255); font-size:11pt; font-family:Calibri,Helvetica,sans-serif">Papers providing
empirical evidence of a system's performance such as benchmarking or comparative analyses of rule engines, evaluating rule-based machine learning, or presenting high-impact case studies. Submissions may also cover industrial experiences, rule- and model-driven
engineering, or innovative applications. </span></font></li></ul>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Key themes</span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> of
the Rule Challenge include, but are not limited to the following: </span></font></div>
<ul style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:15px; margin-top:14pt; margin-bottom:14pt">
<li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Rule-based machine learning tools and techniques </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Neuro-symbolic reasoning</span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Large language models (LLMs) and rule learning </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Rule-based approaches in Artificial Intelligence
(AI) </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Rule-based approaches for explainable AI</span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Rule-based Complex Event Processing / Recognition
(CEP/CER) </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Stream reasoning </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Business rules modelling </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Rule standardization for research, industry and government</span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Graph-relational data and knowledge systems </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Higher-order logic and modal logic systems </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Rule and ontology combinations </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Distributed rule systems / Multi-agent systems </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Ontology-Based Data Access (OBDA) systems </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Answer Set Programming (ASP) systems </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Constraint Logic Programming (CLP) systems </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">(Controlled) Natural language interfaces </span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Rules and model-driven engineering</span></font></li></ul>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">The challenge seeks high-quality, original papers, potentially referencing online
material, and ranging between </span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">8-15
pages</span></b></span></font><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">. Accepted papers will be published as part of
CEUR proceedings and should be in the CEUR-WS.org style template CEURART (1-column variant).</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Please submit your paper via:</span></font></div>
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<a href="https://cmt3.research.microsoft.com/DAI2026/" target="_blank" rel="noopener noreferrer"><font style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">https://cmt3.research.microsoft.com/DAI2026/</span></font></a></div>
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<div style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:15px; margin-top:0px; margin-bottom:0px">
<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">to the Rule Challenge track.</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Important Dates (Anywhere on Earth
- AoE):</span></b></span></font></div>
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<li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> June 5th, 2026: Paper submission deadline</span></font></li><li style="margin-left:15px"><font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)"> July 3rd, 2026: Notification of acceptance</span></font></li></ul>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Chairs:</span></b></span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Szymon Bobek, Jagiellonian University in Krakow, Poland</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Zeynep G. Saribatur, TU Wien, Austria</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="background-color:transparent"><b><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Program Committee:</span></b></span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Dörthe Arndt, TU Dresden</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Juliana Bowles, University of St Andrews</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Stefania Costantini, University of L'Aquila</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Joao Gama, INESC TEC - LIAAD</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Ognjen Savkovic, Free University of Bozen-Bolzano</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Marek Sikora, Silesian University of Technology</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">William Van Woensel, University of Ottawa</span></font></div>
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<font color="black" style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">Further information can be found on the Rule Challenge website:</span></font></div>
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<a href="https://2026.declarativeai.net/ruleml-rr/rule-challenge" target="_blank" rel="noopener noreferrer" title="https://2026.declarativeai.net/ruleml-rr/rule-challenge
Cmd+Fai clic o tocca il collegamento per aprirlo"><font style="font-family:Arial,sans-serif,serif,EmojiFont"><span style="font-size:11pt; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">https://2026.declarativeai.net/events/ruleml-rr/rule-challenge</span></font></a></div>
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