Evaluating retrieval performance for Japanese question answering: what are best passages? Tetsuya Sakai and Tomoharu Kokubu Return to Posters BIBTEX @inproceedings       {DBLP:conf/sigir/SakaiK03,   author    = {Tetsuya Sakai and                 Tomoharu Kokubu},    booktitle = {SIGIR},    title     = {Evaluating retrieval performance for Japanese question answering: what are best passages?},    pages     = {429-430},    year      = {2003},    url       = {db/conf/sigir/sigir2003.html#SakaiK03},    ee        = {http://doi.acm.org/10.1145/860535},    crossref  = {conf/sigir/2003},    bibsource = {DBLP, http://dblp.uni-trier.de}  } ©2004 Association for Computing Machinery