Automatic transformation of phrase treebanks to dependency trees
Michael Daum, Kilian A. Foth, Wolfgang Menzel
Natural Language Systems, Department of Computer Science, University of Hamburg
Word-to-word dependency structures are useful for consistent representation and comparable evaluation of parsing results. However, most large-scale treebanks contain various variants of phrase structure trees, since automatic parsers usually produce constituent structures. We present a freely available extensible tool for converting phrase structure to dependencies automatically, and discuss its application to the NEGRA treebank of German.
treebank, dependency trees, phrase structure trees, corpus conversion