An empirical study for generating zero pronoun in Korean based on Cost-based centering model Ji-Eun Roh author Jong-Hyeok Lee author 2003-12 text Proceedings of the Australasian Language Technology Workshop 2003 Catherine Bow editor Baden Hughes editor Melbourne, Australia conference publication roh-lee-2003-empirical https://aclanthology.org/U03-1004/ 2003-12 30 37