Discourse in Multimedia: A Case Study in Extracting Geometry Knowledge from Textbooks Mrinmaya Sachan author Avinava Dubey author Eduard H Hovy author Tom M Mitchell author Dan Roth author Eric P Xing author 2019-12 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal sachan-etal-2019-discourse 10.1162/coli_a_00360 https://aclanthology.org/J19-4002/ 2019-12 45 4 627 665