Concept Grounding to Multiple Knowledge Bases via Indirect Supervision Chen-Tse Tsai author Dan Roth author 2016 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal tsai-roth-2016-concept 10.1162/tacl_a_00089 https://aclanthology.org/Q16-1011/ 2016 4 141 154