Exploring Temporal Vagueness with Mechanical Turk Yuping Zhou author Nianwen Xue author 2012-07 text Proceedings of the Sixth Linguistic Annotation Workshop Nancy Ide editor Fei Xia editor Association for Computational Linguistics Jeju, Republic of Korea conference publication zhou-xue-2012-exploring https://aclanthology.org/W12-3616/ 2012-07 124 128