An Empirical Study of Semi-supervised Structured Conditional Models for Dependency Parsing Jun Suzuki author Hideki Isozaki author Xavier Carreras author Michael Collins author 2009-08 text Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing Philipp Koehn editor Rada Mihalcea editor Association for Computational Linguistics Singapore conference publication suzuki-etal-2009-empirical https://aclanthology.org/D09-1058/ 2009-08 551 560