Ryo Hasegawa Motohiro Kitamura Haruhiko Kaiya Motoshi Saeki Extracting Conceptual Graphs from Japanese Documents for Software Requirements Modeling. 87-96 2009 APCCM http://crpit.com/confpapers/CRPITV96Hasegawa.pdf conf/apccm/2009 db/conf/apccm/apccm2009.html#HasegawaKKS09