pdf dblpKorea University Question Answering System at TREC 2004Kyoung-Soo Han | Hoo-Jung Chung | Sang-Bum Kim | Young-In Song | Joo-Young Lee | Hae-Chang RimProceedings of the Thirteenth Text REtrieval Conference, TREC 2004, Gaithersburg, Maryland, USA, November 16-19, 2004