An Event Information Retrieval Method Using Features of Keyword Appearance in Newspaper Corpora 論文 Hiromi Itoh Ozaku・Masao Utiyama・Hitoshi Isahara・Yasuyuki Kono・Masatsugu Kidode ·2004-01-01 ·『Transactions of the Japanese Society for Artificial Intelligence』 19 pp. 225-233 doi:10.1527/tjsai.19.225