Dependency-based answer validation for German

Svitlana Babych, Alexander Henn, Jan Pawellek, Sebastian Pado

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations


This article describes the Heidelberg contribution to the CLEF 2011 QA4MRE task for German. We focus on the objective of not using any external resources, building a system that represents questions, answers and texts as formulae in propositional logic derived from dependency structure. Background knowledge is extracted from the background corpora using several knowledge extraction strategies. We answer questions by attempting to infer answers from the test documents complemented by background knowledge, with a distance measure as fall-back. The main challenge is to specify the translation from dependency structure into a logical representation. For this step, we suggest different rule sets and evaluate various configuration parameters that tune accuracy and coverage. All of runs exceed a random baseline, but show different coverage/accuracy profiles (accuracy up to 44%, coverage up to 65%).

Original languageEnglish (US)
JournalCEUR Workshop Proceedings
StatePublished - 2011
Externally publishedYes
Event2011 Cross Language Evaluation Forum Conference, CLEF 2011 - Amsterdam, Netherlands
Duration: Sep 19 2011Sep 22 2011


  • German
  • Knowledge extraction
  • Logical inference
  • Machine reading
  • QA4MRE
  • Question answering

ASJC Scopus subject areas

  • General Computer Science

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