Evaluating unsupervised learning for natural language processing tasks Andreas Vlachos author 2011-07 text Proceedings of the First workshop on Unsupervised Learning in NLP Omri Abend editor Anna Korhonen editor Ari Rappoport editor Roi Reichart editor Association for Computational Linguistics Edinburgh, Scotland conference publication vlachos-2011-evaluating https://aclanthology.org/W11-2205/ 2011-07 35 42