Workshop Organizers:

General Session: PASCAL RTE-3 Challenge:

Important dates:

Workshop Paper Submission deadline: March 30, 2007 (extended)
Notification of acceptance: April 23, 2007
Camera ready due: May 6, 2007
Workshop Date: June 28-29, 2007

What's New

FREE MEAL!! Cheese and wine will be served at the poster session on the first day (June 28). It will be followed by a dinner. All the participants are invited to the dinner at the hotel restaurant starting at 7pm. It is free of charge!!

Now, the full schedule is available at the ACL2007 page

We are happy to announce the invited talk will be given by Prof. Oren Etzioni about "Machine Reading and Open Information Extraction"

Welcome to the ACL-PASCAL Workshop on Textual Entailment and Paraphrasing web site

This workshop will take place at the ACL 2007.

  • Date: June, 28 (afternoon) - 29, 2007
  • Location: Prague, Czech Republic
  • in conjunction with ACL 2007
  • Workshop web page:
  • Conference web page:
  • PASCAL RTE3 web page:

    Please look at the "Call for papers" page for the detail of the workshop.

  • Call for papers

    Recognizing and generating textual entailment and paraphrase are regarded as important technologies in a broad range of NLP applications, including machine translation, information retrieval, information extraction, summarization, question answering and text generation. Both textual entailment and paraphrasing address relevant aspects of natural language semantics. Entailment is a directional relation between two expressions in which one of them implies the other, whereas paraphrase is a relation in which two expressions convey essentially the same meaning. Indeed, paraphrase can be defined as bi-directional entailment. While it may be debatable how such semantic definitions can be made well-founded, in practice we have already seen evidence that such knowledge is essential for many applications.

    There have been two lines of workshops in this field. One is a series of three workshops on paraphrasing -- in Tokyo 2001, in Sapporo at ACL-2003 and in Jeju at IJCNLP-2005.The other is the Workshop on Empirical Modeling of Semantic Equivalence and Entailment (at ACL-2005), and two workshops of the previous PASCAL Recognizing Textual Entailment (RTE) Challenges (2005 and 2006). We combine those two lines of similar effort together at this workshop in order to see the convergence of the field and exchange ideas among a wider audience. The workshop has two parts, one is the general session where submission is open, and the other is the concluding workshop of the 3rd PASCAL RTE Challenge. The program will include general session papers and selected presentations and a poster session of RTE-3 systems. See PASCAL RTE homepage for details about the RTE-3 challenge (with result submission deadline on March 12).

    This CFP calls for papers for the general session. Any research topic related to textual entailment and paraphrasing in any language is welcome. More specifically, topics of interest include, but are not limited to:

    Workshop Paper Submission deadline: March 30, 2007 (extended)
    Notification of acceptance: April 23, 2007
    Camera ready due: May 6, 2007
    Workshop Date: June 28 (afternoon) - 29, 2007

    Program Committee:

  • Caroline Brun (Xerox Research Centre Europe, France)
  • Johan Bos (University of Rome "La Sapienza")
  • Robert Dale (Macquarie University)
  • Mark Dras (Macquarie University)
  • Anette Frank (DFKI)
  • Ralph Grishman (New York University)
  • Sanda Harabagiu (University of Texas at Dallas)
  • Graeme Hirst (University of Toronto)
  • Yves Lepage (Universite de Caen)
  • Dekang Lin (Google)
  • Katja Markert (University of Leeds)
  • Chris Manning (Stanford University)
  • Rada Mihalcea (University of North Texas)
  • Dan Moldovan (University of Texas at Dallas)
  • Patrick Pantel (ISI)
  • Kiyonori Ohtake (ATR)
  • Ellen Riloff (University of Utah)
  • Dan Roth (University of Illinois at Urbana-Champaign)
  • Satoshi Sato (Nagoya University)
  • Hinrich Schuetze (University of Stuttgart)
  • Donia Scott (Open University)
  • Kentaro Torisawa (JAIST)
  • Lucy Vanderwende (Microsoft Research)
  • Kazuhide Yamamoto (Nagaoka University of Technology)
  • Fabio Zanzotto (University of Rome "Tor Vergata")
  • Workshop program

    Now, the full schedule is available at the ACL2007 page

    Schedule overview

    June 28 (Day 1)
    2:00-2:05  Introduction
    2:05-2:30  RTE Introduction & Overview 
    2:30-3:45  presentation (3x25min)
    4:15-4:40  presentation (1x25min)
    4:40-5:10  RTE Poster booster (2 min presentation for each)
    5:10-6:15  RTE poster (65min; with wine and cheese)
    June 29 (Day 2)
    9:00-10:15  presentation (3x25min)
    10:15-10:45 pilot task overview
    11:15-12:05 presentation (2x25min)
    12:05-1:00  Invited talk (55min)
    2:30-3:45   presentation (3x25min)
    4:15-5:30   presentation (3x25min)
    5:30-6:15   Open Discussion (45min)

    Invited Talk

    Speaker: Prof. Oren Etzioni
    Title: Machine Reading and Open Information Extraction
    Abstract: Is it possible to acquire a massive body of high-quality knowledge
    from the Web? My talk will describe our KnowItAll research project, which
    has been investigating this and related questions over the last five years.
    We have scaled and generalized information extraction methods to process
    arbitrary Web text, and to handle unanticipated concepts, but many
    challenges remain.  One of the most formidable challenges is moving from
    extracting isolated nuggets of information to capturing a coherent body of
    knowledge that can support automatic inference.  Yet, textual entailment
    would seem to benefit from exactly the sort of knowledge we are attempting
    to extract.  I hope that my talk will help to stimulate dialogue between
    information extraction and textual entailment researchers on these crucial
    Bio:  Oren Etzioni is a Professor of Computer Science at the University of
    Washington's Computer Science Department, and the founder and director of
    the university's Turing Center.  He received his Ph.D. from Carnegie Mellon
    in 1990, and his B.A. from Harvard in 1986.  Etzioni has authored of over
    100 technical papers on topics ranging from intelligent agents to data
    mining and Web search.  In 2005, he was awarded the IJCAI Distinguished
    Paper Award for "A Probabilistic Model of Redundancy in Information
    Extraction".  He received a National Young Investigator Award in 1993, and
    was chosen as a AAAI Fellow a decade later.  
    Etzioni is the founder of three companies.  Most recently, he is the founder
    of Farecast (, a company that utilizes data mining to
    inform consumers about the right time to buy their air tickets.  His work
    has been featured in the New York Times, Wall Street Journal, NPR, SCIENCE,
    The Economist, TIME Magazine, Business Week, Newsweek, Discover Magazine,
    Forbes Magazine, Wired, and elsewhere.

    Accepted Papers

    General Session
    Bill MacCartney and Christopher D. Manning: Natural Logic for Textual
    Rodney D. Nielsen and Wayne Ward: A Corpus of Fine-Grained Entailment
    Joao Cordeiro, Gael Dias and Guillaume Cleuziou: Biology Based
    Alignments of Paraphrases for Sentence Compression
    Atsushi Fujita, Shuhei Kato, Naoki Kato and Satoshi Sato: A
    Compositional Approach toward Dynamic Phrasal Thesaurus
    Michael Ellsworth and Adam Janin: Mutaphrase: Paraphrasing with FrameNet
    Marilisa Amoia and Claire Gardent: A first order semantic approach to
    adjectival inference
    RTE session oral presentations
    Nathanael Chambers, Daniel Cer, Trond Grenager, David Hall, Chloe Kiddon,
    Bill MacCartney, Marie-Catherine de Marneffe, Daniel Ramage, Eric Yeh
    and Christopher D. Manning: Learning Alignments and Leveraging Natural
    Andrew Hickl and Jeremy Bensley: A Discourse Commitment-Based Framework
    for Recognizing Textual Entailment
    Adrian Iftene and Alexandra Balahur-Dobrescu: Hypothesis Transformation
    and Semantic Variability Rules Used in Recognizing Textual Entailment 
    Aljoscha Burchardt, Nils Reiter, Stefan Thater and Anette Frank: A
    Semantic Approach to Textual Entailment: System Evaluation and Task
    Daniel Bobrow, Dick Crouch, Tracy Halloway King, Cleo Condoravdi, Lauri
    Karttunen, Rowan Nairn, Valeria de Paiva and Annie Zaenen:
    Linguistically-focused Textual Entailment 
    Roy Bar-Haim, Ido Dagan, Iddo Greental, Idan Szpektor and Moshe Friedman:
    Semantic Inference at the Lexical-Syntactic Level for Textual Entailment
    Baoli LI, Joseph Irwin, Ernest Garcia and Ashwin Ram: III University at
    the Third Recognizing Textual Entailment Challenge
    Stefan Harmeling: An Extensible Probabilistic Transformation-based
    Approach to the Third Recognizing Textual Entailment Challenge
    Marta Tatu and Dan Moldovan: COGEX at RTE 3
    RTE poster session
    Rui Wang and Gunter Neumann: Applying Subsequence Kernels to Recognizing
    Textual Entailment
    Alvaro Rodrigo, Anselmo Penas, Jesus Herrera and Felisa Verdejo:
    Experiments of UNED at the Third Recognising Textual Entailment
    Gaston Burek and Christian Pietsch: SVO triple based Latent Semantic
    Analysis for recognising textual entailment 
    Prodromos Malakasiotis and Ion Androutsopoulos: Learning Textual
    Entailment using SVMs and String Similarity Measures
    Oscar Ferrandez, Daniel Micol, Rafael Munoz and Manuel Palomar: A
    Perspective-Based Approach for Solving Textual Entailment Recognition
    Fabio Massimo Zanzotto, Marco Pennacchiotti and Alessandro Moschitti:
    Shallow Semantic in Fast Textual Entailment Rule Learners
    Arturo Montejo-Raez, Jose Manuel Perea, Fernando Martinez-Santiago,
    Miguel Angel Garcia-Cumbreras, Maite Martin Valdivia and Alfonso
    Urena-Lopez: Combining Lexical-Syntactic Information with Machine
    Learning for Recognizing Textual Entailment 
    Dan Roth and Mark Sammons: Semantic and Logical Inference Model for
    Textual Entailment
    Daniel Ferres and Horacio Rodriguez: Machine Learning with
    Semantic-Based Distances Between Sentences for Textual Entailment
    Erwin Marsi, Emiel Krahmer and Wauter Bosma: Dependency-based
    paraphrasing for RTE 
    Scott Settembre: Textual Entailment Using Univariate Density Model and
    Maximizing Discriminant Function
    Catherine Blake: The Role of Sentence Structure in Recognizing Textual
    Rodolfo Delmonte: Entailment and Anaphora Resolution in RTE3
    Peter Clark, Phil Harrison, John Thompson, William Murray, Jerry Hobbs
    and Christiane Fellbaum: On the Role of Lexical and World Knowledge in
    Rod Adams, Gabriel Nicolae, Cristina Nicolae and Sanda Harabagiu:
    Textual Entailment Through Extended Lexical Overlap and Lexico-Semantic


    Submission is closed

    General session paper submissions should not exceed 8 pages in length, meanwhile RTE3 reports should include up to 6 double column pages. Format requirments will be the same as for full papers of ACL07. See for style files.

    All paper must be written and presented in English.

    Papers should be submitted as PDF file no later than March 30, 2007 (midnight on US Pacific time), via the following web site