Copenhagen: Tree approximations of semantic parsing problems

Natalie Schluter, Anders Søgaard, Jakob Elming, Dirk Hovy, Barbara Plank, Hector Martinez Alonso, Anders Johanssen, Sigrid Klerke

Research output: Conference Article in Proceeding or Book/Report chapterArticle in proceedingsResearchpeer-review


In this shared task paper for SemEval2014 Task 8, we show that most semantic structures can be approximated by trees through a series of almost bijective graph transformations. We transform input graphs, apply off-the-shelf methods from syntactic parsing on the resulting trees, and retrieve output graphs. Using tree approximations, we obtain good results across three semantic formalisms,
with a 15.9% error reduction over a stateof-the-art semantic role labeling system on development data. Our system came in 3/6 in the shared task closed track.
Original languageEnglish
Title of host publicationProceedings of the 8th International Workshop on Semantic Evaluation (SemEval 2014)
PublisherAssociation for Computational Linguistics
Publication date2014
Publication statusPublished - 2014
Externally publishedYes


  • semantic structures
  • graph transformations
  • syntactic parsing
  • semantic formalisms
  • semantic role labeling


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