Extracting Reputation Expressions from Web-based Review Sites by Using Causal Relationships 論文 Atsuko Takano・Syo-ta Ikeoku・Yasuhiko Kitamura ·2009-01-01 ·『Transactions of the Japanese Society for Artificial Intelligence』 24(3) pp. 322-332 doi:10.1527/tjsai.24.322