%0 Conference Proceedings %T Mining Words in the Minds of Second Language Learners: Learner-Specific Word Difficulty %A Ehara, Yo %A Sato, Issei %A Oiwa, Hidekazu %A Nakagawa, Hiroshi %Y Kay, Martin %Y Boitet, Christian %S Proceedings of COLING 2012 %D 2012 %8 December %I The COLING 2012 Organizing Committee %C Mumbai, India %F ehara-etal-2012-mining %U https://aclanthology.org/C12-1049 %P 799-814