Verb Phrase Ellipsis detection using Automatically Parsed Text Leif Arda Nielsen author 2004-aug 23–aug 27 text COLING 2004: Proceedings of the 20th International Conference on Computational Linguistics COLING Geneva, Switzerland conference publication nielsen-2004-verb https://aclanthology.org/C04-1157/ 2004-aug 23–aug 27 1093 1099