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Touche 2021 (2nd CfP): Argument Retrieval
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We invite you to take part in the 2nd Shared Task on Argument Retrieval, Touche, which will be held in conjunction with the CLEF'21 conference in Bucharest, Romania. We propose the following two tasks:

1. Argument Retrieval for Controversial Questions
Given a controversial question, retrieve arguments from the provided dataset to support users who search for arguments directly, e.g., to support their stance.

2. Argument Retrieval for Comparative Questions
Given an argumentative comparative question, retrieve ranked documents from a general web crawl ClueWeb12 that help to answer the question.

Learn more at https://touche.webis.de/

Register via the CLEF website: http://clef2021-labs-registration.dei.unipd.it/

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Important Dates
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now open             Registration
May      1, 2021     Approaches submission
May     28, 2021     Participant paper submission
July     2, 2021     Camera-ready participant papers submission
Sep  21-24, 2021     Conference

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Special Announcements
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Touche Open Source Proceedings

Touché will host a collection of software developed by participants at GitHub.
We invite you to publish your software too and invite software submissions using TIRA.

In case of questions / suggestions / etc., please reach us via touche@webis.de.

Best regards, 
Touché organizing committee