Anne-Laure Ligozat Brigitte Grau Anne Vilnat Isabelle Robba Arnaud Grappy Towards an Automatic Validation of Answers in Question Answering. 444-447 2007 conf/ictai/2007-2 ICTAI (2) http://doi.ieeecomputersociety.org/10.1109/ICTAI.2007.179 db/conf/ictai/ictai2007-2.html#LigozatGVRG07