Investigating Unsupervised Learning for Text Categorization Bootstrapping Alfio Gliozzo author Carlo Strapparava author Ido Dagan author 2005-10 text Proceedings of Human Language Technology Conference and Conference on Empirical Methods in Natural Language Processing Raymond Mooney editor Chris Brew editor Lee-Feng Chien editor Katrin Kirchhoff editor Association for Computational Linguistics Vancouver, British Columbia, Canada conference publication gliozzo-etal-2005-investigating https://aclanthology.org/H05-1017/ 2005-10 129 136