Ambiguity-aware Ensemble Training for Semi-supervised Dependency Parsing Zhenghua Li author Min Zhang author Wenliang Chen author 2014-06 text Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Kristina Toutanova editor Hua Wu editor Association for Computational Linguistics Baltimore, Maryland conference publication li-etal-2014-ambiguity 10.3115/v1/P14-1043 https://aclanthology.org/P14-1043/ 2014-06 457 467