An Analysis of Bootstrapping for the Recognition of Temporal Expressions Jordi Poveda author Mihai Surdeanu author Jordi Turmo 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 poveda-etal-2009-analysis https://aclanthology.org/W09-2207/ 2009-06 49 57