Can One Language Bootstrap the Other: A Case Study on Event Extraction Zheng Chen author Heng Ji 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 chen-ji-2009-one https://aclanthology.org/W09-2209/ 2009-06 66 74