Rada Mihalcea author Vivi Nastase author 2012-07 text Haizhou Li editor Chin-Yew Lin editor Miles Osborne editor Gary Geunbae Lee editor Jong C Park editor Association for Computational Linguistics Jeju Island, Korea conference publication mihalcea-nastase-2012-word https://aclanthology.org/P12-2051/ 2012-07 259 263