Semi-Supervised Learning for Natural Language Processing John Blitzer author Xiaojin Jerry Zhu author 2008-06 text Tutorial Abstracts of ACL-08: HLT Ani Nenkova editor Marilyn Walker editor Eugene Agichtein editor Association for Computational Linguistics Columbus, Ohio conference publication blitzer-zhu-2008-semi https://aclanthology.org/P08-5003/ 2008-06 3