First CfP: Shared Tasks on Disinformation and Persuasion co-located with EACL 2027 at SlavicNLP Workshop

Slavic NLP 2027 features shared tasks on persuasion techniques, disinformation detection, and the PolEval campaign. Participants can take part online or onsite. Tasks are focues on Slavic languages with English dataset provided for Disinfomration Detection Task to invite the broader audience outside the SlavicNLP community.

1. Persuasion Techniques Detection & Classification - 2ND EDITION
Detection and classification of persuasion techniques at the sentence level (binary classification and multilabel classification subtasks), using a taxonomy of 25 persuasion techniques and building on the paragraph-level annotated dataset from the Slavic NLP 2025 Shared Task.
• Languages: Bulgarian, Polish, and Russian; surprise language(s) in the test data.
• Genres: parliamentary debates and disinformation-related social media posts.
• Training data covers Polish, Bulgarian, and Russian.
• Additional multilingual persuasion-technique resources may be used.

2. Disinformation Detection - 1ST EDITION, BINARY CLASSIFICATION
Binary classification of texts as disinformation versus non-disinformation, building on established disinformation resources and encouraging multilingual participation.
• Languages: Polish and English; surprise language(s) in the test data.
• Training data include MIPD, MultiDis, and MALINT presented at major NLP conferences.
• Additional relevant public or private disinformation datasets may be used.

3. PolEval - INDEPENDENTLY ORGANIZED CAMPAIGN
Slavic NLP 2027 features the PolEval campaign, a long-running Polish-language evaluation campaign for NLP systems. PolEval is organized independently from the other Slavic NLP shared tasks.
• PolEval includes four different shared tasks, e.g. Polish Language Document Layout Detection
• Exact 2027 PolEval task descriptions available under https://poleval.pl/
• PolEval winners will be mentioned at the Slavic NLP Workshop.
• Winners will have the opportunity to present their system papers at Slavic NLP.

MORE INFORMATION
For more information about Shared Tasks, please visit our website: https://slavicnlp.github.io

IMPORTANT DATES
Registration deadline: 18 December 2026
Release of test data to registered participants: 21 December 2026
Submission of system responses: 7 January 2027
Results announced to participants: 10 January 2027
Shared Task paper submission deadline: 13 January 2027
Shared Task papers notification: 23 January 2027
Camera-ready Shared Task paper due: 30 January 2027

Workshop contact: bsnlp [at] cs.helsinki.fi

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Kind Regards,
Arkadiusz Modzelewski
https://amodzelewski.com/

On behalf of the SlavicNLP Organizing Committee:

Jakub Piskorski
Dimitar Dimitrov
Michał Marcińczuk
Arkadiusz Modzelewski
Preslav Nakov
Agata Savary
Roman Yangarber