Large-Scale Corpus-Driven PCFG Approximation of an HPSG Yi Zhang author Hans-Ulrich Krieger author 2011-10 text Proceedings of the 12th International Conference on Parsing Technologies Harry Bunt editor Joakim Nivre editor Özlem Çetinoglu editor Association for Computational Linguistics Dublin, Ireland conference publication zhang-krieger-2011-large https://aclanthology.org/W11-2923/ 2011-10 198 208