Wataru Sunayama Katsutoshi Yada The River-Rafting System for Knowledge Discovery Related to Persuasion Process Conversation Logs. 575-579 2006 conf/icdm/2006w ICDM Workshops http://doi.ieeecomputersociety.org/10.1109/ICDMW.2006.156 db/conf/icdm/icdmw2006.html#SunayamaY06