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Evolution of Multilingual Question Answering Track: Insights from CLEF 2007

The CLEF 2007 Multilingual Question Answering Track showcased the evolution of QA systems across ten source languages, focusing on factoid, definition, and linked questions. With contributions from various academic institutions like UNED and DFKI, the track evaluated the challenges faced, such as the complexity of questions and the necessity for higher quality results. This year marked significant developments including the introduction of new tasks, the participation of 22 teams, and an analysis of system performance. The findings reflect the ongoing struggle to balance real-world applications with research interests in the field.

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Evolution of Multilingual Question Answering Track: Insights from CLEF 2007

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  1. CLEF 2007Multilingual Question Answering Track Danilo Giampiccolo, CELCT Anselmo Peñas, UNED

  2. Main Task QA 2007Organizing Committee • CELCT (D. Giampiccolo, P. Forner): Italian • UNED (A. Peñas): Spanish • U. Amsterdam (V. Jijkoun): Dutch • U. Limerick (R. Sutcliff): English • DFKI (B. Sacalenau): German • ELDA/ELRA (C. Ayache): French • Linguateca (P. Rocha): Portuguese • Bulgarian Academy of Sciences (P. Osenova): Bulgarian • IASI (D. Cristea): Romanian • Only Source Languages: • Depok University of Indonesia (M. Adriani): Indonesian

  3. Time goes… 2000 2001 2002 2003 2004 2005 2006 2007 CLEF QA Track

  4. Evolution of the Track

  5. 200 questions • FACTOID • (loc, mea, org, per, tim, cnt, obj , oth) • DEFINITION • (per, org, obj, oth) • Person: Who is Josef Paul Kleihues? • Object: What is a router? • Other: What is a tsunami? • CLOSED LIST • Who were the components of The Beatles? • Who were the last three presidents of Italy? • Temporal restrictions by date, by period, by event • NIL questions (without known answer in the collection) New!

  6. Linked questions New! • TOPIC: Otto von Bismarck • Who was called the “Iron-Chancellor”? • When was he born? • Who was his first wife? • Topics • Person or Event • Not provided to participants • Only a portion of the questions (from 15% depending on languages)

  7. Activated Tasks (at least one registered participant) • 10 Source languages (11 in 2006: no Polish) • 9 Target languages (8 in 2006: Romanian added)

  8. ActivatedTasks

  9. Participants

  10. Submitted runs

  11. Lower (not low) participation • New collection to be indexed • Wikipedia • More difficult questions • Linked questions • Closed lists • Big surprise • Guidelines too late • Evaluate developers time reaction?

  12. Industrial Companies Final list of participants (random order)

  13. Results: Best and Average scores

  14. Best scores by language

  15. Best scores by participant

  16. Lower results • Some answers only in wikipedia • Closed lists • Almost no answers • Temporal restrictions • Still very difficult • Linked questions • Topic not provided • Fail the first, fail the rest • Co-reference resolution

  17. Conclusion • Much more difficulty • Less participants • Poorer results • But • New challenges • New collections • 10 languages • 37 activated subtasks • 22 participants • 37 runs

  18. Conclusion • QA Track continues its evolution • Although we are a big heterogeneous community • Trying to find a compromise between • Real world application • Interest for research • User needs / model • Systems ability • Available collections • Replication of experiments • Components evaluation • Newcomers • Natural progress • …

  19. Questions for breakout • Repeat task (second chance) • Simplification • Components evaluation • Question classification • Passage retrieval • Answer extraction • Pilots • Repeat existing? • New exercises • 2007 exercises -> 2008? • Multilinguality • NILs, types of questions • Vision • …

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