Representation Learning for Grounded Spatial Reasoning Michael Janner author Karthik Narasimhan author Regina Barzilay author 2018 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal janner-etal-2018-representation 10.1162/tacl_a_00004 https://aclanthology.org/Q18-1004/ 2018 6 49 61