Using the Web to Overcome Data Sparseness Frank Keller author Maria Lapata author Olga Ourioupina author 2002-07 text Proceedings of the 2002 Conference on Empirical Methods in Natural Language Processing (EMNLP 2002) Association for Computational Linguistics conference publication keller-etal-2002-using 10.3115/1118693.1118723 https://aclanthology.org/W02-1030/ 2002-07 230 237