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<p align="center"><font size="3"><b>Call for participation<br>
</b></font></p>
<p align="center"><font size="3"><b>Tweet Contextualization </b></font>
</p>
<p align="center"><font size="3">an INEX Lab at CLEF 2012, 17–20
September in Rome, Italy</font></p>
<p align="justify"><br>
</p>
<p align="justify"><font size="3">Participants are solicited for the
</font><font size="3"><b>tweet contextualization</b></font><font
size="3">
INEX task at CLEF 2012. The use case of this new task is the
following: given a new tweet, the </font>system must provide some
context about the subject of the tweet, in order to help the reader
to understand it. This context should take the form of a <b>readable
summary, not </b><font size="3"><b>exceeding 500 words, composed of
passages from a provided Wikipedia corpus</b></font><font size="3">.
For more information visit
<a href="https://inex.mmci.uni-saarland.de/tracks/qa/">https://inex.mmci.uni-saarland.de/tracks/qa/</a>.
</font>
</p>
<p align="justify">The results of the evaluation campaign will be
disseminated at the final workshop which will be organized in
conjunction with the CLEF 2012 conference, 17–20 September in Rome,
Italy.</p>
<p style="margin-bottom: 0cm;"><b>Test data</b></p>
<p style="margin-bottom: 0cm;" align="justify">About 1000 tweets in
English will be collected by the organizers from Twitter<font
face="Times New Roman, serif">®</font>.
They will be selected among informative accounts (for example, @CNN,
@TennisTweets, @PeopleMag, @science...), in order to avoid purely
personal tweets that could not be contextualized. Information such as
the user name, tags or URLs will be provided. The tweets will be made
available in a JSON format.</p>
<p style="margin-bottom: 0cm;">The document collection
is a recent dump of the English Wikipedia (November 2011). Since we
target non factual answers but short contextualizing texts, we
removed all the info box and the external references, leaving only
the textual content with all its document structure (title, abstract,
sections, subtitles and paragraphs) and its internal references
(links towards other pages).<br>
<br>
</p>
<p style="margin-bottom: 0cm;"><b>Evaluation </b>
</p>
<p style="margin-bottom: 0cm;">The summaries will be evaluated
according to:</p>
<p style="margin-bottom: 0cm;">- the way they overlap with relevant
passages (number of them, vocabulary and bi-grams included or
missing),</p>
<p style="margin-bottom: 0cm;">- the readability assessed by
evaluators and participants.<br>
<br>
</p>
<p style="margin-bottom: 0cm;"><font size="3"><b>Schedule</b></font></p>
<p style="margin-bottom: 0cm;"><font size="3"><b>March, 1 2012 </b><span
style="font-weight: normal;">Online
Registrations to the Labs opens </span><b><br>
March, 26 2012 </b><span style="font-weight: normal;">Test
set release. </span><b><br>
June, 1 2012 </b><span style="font-weight: normal;">Run
submissions. </span><b><br>
June, 30 2012 </b><span style="font-weight: normal;">Release
of manual evaluation of readability by participants. </span><b><br>
July,
15 2012 </b><span style="font-weight: normal;">Results to
participants. </span><b><br>
August 17 2012 </b><span style="font-weight: normal;">Submission
of CLEF 2012 Working Notes papers </span><b><br>
August 24 2012
</b><span style="font-weight: normal;">Submission of CLEF 2012 Labs
Overviews </span><b><br>
September 17-20 2012 </b><span style="font-weight: normal;">CLEF
2012 Conference<br>
<br>
</span></font></p>
<p style="margin-bottom: 0cm;"><font size="3"><b>Organizers (contact :
<a class="moz-txt-link-abbreviated" href="mailto:contextweet@limsi.fr">contextweet@limsi.fr</a>)</b></font></p>
<p style="margin-bottom: 0cm;"><span style="font-weight: normal;">Patrice
Bellot, LSIS - Aix-Marseille University<br>
Josiane Mothe, IRIT,
University of Toulouse<br>
Véronique Moriceau, LIMSI-CNRS, University
Paris-Sud<br>
Eric SanJuan, LIA, University of Avignon<br>
Xavier
Tannier,</span><b> </b>LIMSI-CNRS, University Paris-Sud </p>
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