A Mechanism for ellipsis resolution in dialogued systems A Diaz de Ilarraza Sanchez author H Rodriguez Hontoria author F Maillo Verdejo author 1990 text COLING 1990 Volume 3: Papers presented to the 13th International Conference on Computational Linguistics conference publication diaz-de-ilarraza-sanchez-etal-1990-mechanism https://aclanthology.org/C90-3102/ 1990