The central aspects of our discussion are (a) three dependency formats: two 'classic' representations for dependency parsing, namely, Stanford Basic (SB) and CoNLL Syntactic Dependencies (CD), and bilexical dependencies from the HPSG English Resource Grammar (ERG), so-called DELPH-IN Syntactic Derivation Tree (DT), proposed recently by Ivanova et al. (2012) ; (b) three state-of-the art statistical parsers: Malt (Nivre et al., 2007) , MST (McDonald et al., 2005) and the parser of <cite>Bohnet and Nivre (2012)</cite> ; (c) two approaches to wordcategory disambiguation, e.g. exploiting common PTB tags and using supertags (i.e. specialized ERG lexical types).