Shared Task on Processing German CMC/Social Media & Web Data

Shared Task: Call for Participation

The EmpiriST 2015 shared task aims to encourage the developers of NLP applications to adapt their tools and resources for the processing of written German discourse in genres of computer-mediated communication (CMC) - such as chats, forums, wiki talk pages, tweets, blog comments, social networks, SMS and WhatsApp dialogues - as well as monological web pages - such as personal or professional blogs, Wikipedia articles, academic sites, etc.

The shared task is divided into two subtasks (A: tokenization, B: POS tagging) and two different data sets (CMC subset, web corpora subset). While our main goal is to foster the development of robust tools that work well on a wide range of CMC & web genres, teams are allowed to focus on one subtask or one subset only. Full manually annotated training data are available now on the EmpiriST homepage, comprising approx. 5000 tokens for each subset.

Results and system descriptions will be presented in the WAC-X workshop co-located with ACL 2016 in Berlin, Germany (11 or 12 August 2016).

For more information, including detailed annotation guidelines and instructions for participation, see the EmpiriST homepage at:

and join our Google group for updates, questions and discussion:

While EmpiriST is focussed on the annotation of German-language data, familiarity with German is not essential for participating in the task. There are sufficient amounts of training data for general machine learning, domain adaptation and optimization approaches. We also provide an English summary of the POS tagset and annotation guidelines.


  • 20.12.2015 Release of the training data
  • 31.01.2016 Team registration
  • 15.02.2016 Release of the evaluation data for the tokenization subtask
  • 19.02.2016 Submission deadline for the tokenization subtask
  • 22.02.2016 Release of the evaluation data for the POS-tagging subtask
  • 26.02.2016 Submission deadline for the POS-tagging subtask
  • ca. April 2016 Submission of system description papers
  • 11/12.08.2016 Presentation of systems and task results at WAC-X workshop (ACL 2016, Berlin)


CMC data set:

  • Michael Beißwenger (Technische Universität Dortmund)
  • Kay-Michael Würzner (Berlin-Brandenburgische Akademie der Wissenschaften)

Web corpora data set:

  • Sabine Bartsch (Technische Universität Darmstadt)
  • Stefan Evert (Universität Erlangen-Nürnberg)