Head-Driven Parsing for Word Lattices Christopher Collins author Bob Carpenter author Gerald Penn author 2004-07 text Proceedings of the 42nd Annual Meeting of the Association for Computational Linguistics (ACL-04) Barcelona, Spain conference publication collins-etal-2004-head 10.3115/1218955.1218985 https://aclanthology.org/P04-1030/ 2004-07 231 238