Surrogate Learning - From Feature Independence to Semi-Supervised Classification Sriharsha Veeramachaneni author Ravi Kumar Kondadadi author 2009-06 text Proceedings of the NAACL HLT 2009 Workshop on Semi-supervised Learning for Natural Language Processing Qin Iris Wang editor Kevin Duh editor Dekang Lin editor Association for Computational Linguistics Boulder, Colorado conference publication veeramachaneni-kondadadi-2009-surrogate https://aclanthology.org/W09-2202/ 2009-06 10 18