Design Challenges for Entity Linking Xiao Ling author Sameer Singh author Daniel S Weld author 2015 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal ling-etal-2015-design 10.1162/tacl_a_00141 https://aclanthology.org/Q15-1023/ 2015 3 315 328