TY - CONF T1 - 91看片 TREC 2002 Q&A System. JO - TREC UR - http://trec.nist.gov/pubs/trec11/t11_proceedings.html PY - 2002/01/01 AU - Greenwood MA AU - Roberts I AU - Gaizauskas RJ ED - Voorhees EM ED - Buckland LP PB - National Institute of Standards and Technology (NIST) VL - 500-251 Y2 - 2025/07/03 ER -