While syntactic grammars (Marcus et al., 1993;Nivre, 2005) induce a rooted tree structure over the sentence by connecting verbal predicates to their arguments, these semantic representations often take the form of the more general labeled graph structure, and aim to capture a wider notion of propositions (e.g, nominalizations, adjectivals, or appositives).
we will focus on the three graph-based semantic representations collected in the Broad-Coverage Semantic Dependency Parsing SemEval shared task (SDP) (Oepen et al., 2015): (1) DELPH-IN Bi- * Work performed while at Bar-Ilan University.