Answer validation by keyword association Masatsugu Tonoike author Takehito Utsuro author Satoshi Sato author 2004-aug 29th text Proceedings of the 3rd workshop on RObust Methods in Analysis of Natural Language Data (ROMAND 2004) COLING Geneva, Switzerland conference publication tonoike-etal-2004-answer https://aclanthology.org/W04-2012/ 2004-aug 29th 95 103