Annotating and Learning Event Durations in Text Feng Pan author Rutu Mulkar-Mehta author Jerry R Hobbs author 2011-12 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal pan-etal-2011-annotating 10.1162/COLI_a_00075 https://aclanthology.org/J11-4005/ 2011-12 37 4 727 752