{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,4]],"date-time":"2026-07-04T14:46:15Z","timestamp":1783176375599,"version":"3.54.6"},"publisher-location":"New York, NY, USA","reference-count":26,"publisher":"ACM","license":[{"start":{"date-parts":[[2009,11,2]],"date-time":"2009-11-02T00:00:00Z","timestamp":1257120000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2009,11,2]]},"DOI":"10.1145\/1645953.1645989","type":"proceedings-article","created":{"date-parts":[[2009,11,10]],"date-time":"2009-11-10T18:36:45Z","timestamp":1257878205000},"page":"265-274","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":61,"title":["The use of categorization information in language models for question retrieval"],"prefix":"10.1145","author":[{"given":"Xin","family":"Cao","sequence":"first","affiliation":[{"name":"Aalborg University, Aalborg, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gao","family":"Cong","sequence":"additional","affiliation":[{"name":"Aalborg University, Aalborg, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bin","family":"Cui","sequence":"additional","affiliation":[{"name":"Peking University, Beijing, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian S\u00f8ndergaard","family":"Jensen","sequence":"additional","affiliation":[{"name":"Aalborg University, Aalborg , Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ce","family":"Zhang","sequence":"additional","affiliation":[{"name":"Peking University, Beijing, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2009,11,2]]},"reference":[{"key":"e_1_3_2_1_1_1","unstructured":"TREC. http:\/\/trec.nist.gov\/.  TREC. http:\/\/trec.nist.gov\/."},{"key":"e_1_3_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/345508.345576"},{"key":"e_1_3_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1145\/1367497.1367561"},{"issue":"2","key":"e_1_3_2_1_4_1","first-page":"57","article-title":"Question answering from frequently asked question files: Experiences with the faq finder system","volume":"18","author":"Burke R. D.","year":"1997","unstructured":"R. D. Burke , K. J. Hammond , V. A. Kulyukin , S. L. Lytinen , N. Tomuro , and S. Schoenberg . Question answering from frequently asked question files: Experiences with the faq finder system . AI Magazine , 18 ( 2 ): 57 -- 66 , 1997 . R. D. Burke, K. J. Hammond, V. A. Kulyukin, S. L. Lytinen, N. Tomuro, and S. Schoenberg. Question answering from frequently asked question files: Experiences with the faq finder system. AI Magazine, 18(2):57--66, 1997.","journal-title":"AI Magazine"},{"key":"e_1_3_2_1_5_1","volume-title":"WWW","author":"Chekuri C.","year":"1997","unstructured":"C. Chekuri , M. H. Goldwasser , P. Raghavan , and E. Upfal . Web search using automatic classification . In WWW , 1997 . C. Chekuri, M. H. Goldwasser, P. Raghavan, and E. Upfal. Web search using automatic classification. In WWW, 1997."},{"key":"e_1_3_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1145\/1099554.1099722"},{"key":"e_1_3_2_1_7_1","first-page":"156","volume-title":"ACL-HLT","author":"Duan H.","year":"2008","unstructured":"H. Duan , Y. Cao , C.-Y. Lin , and Y. Yu . Searching questions by identifying question topic and question focus . In ACL-HLT , pages 156 -- 164 , June 2008 . H. Duan, Y. Cao, C.-Y. Lin, and Y. Yu. Searching questions by identifying question topic and question focus. In ACL-HLT, pages 156--164, June 2008."},{"key":"e_1_3_2_1_8_1","doi-asserted-by":"publisher","DOI":"10.1145\/345508.345593"},{"key":"e_1_3_2_1_9_1","doi-asserted-by":"publisher","DOI":"10.1145\/243199.243216"},{"key":"e_1_3_2_1_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/0020-0271(71)90051-9"},{"key":"e_1_3_2_1_11_1","doi-asserted-by":"publisher","DOI":"10.1145\/1076034.1076156"},{"key":"e_1_3_2_1_12_1","doi-asserted-by":"publisher","DOI":"10.1145\/1099554.1099572"},{"key":"e_1_3_2_1_13_1","doi-asserted-by":"publisher","DOI":"10.1145\/1099554.1099571"},{"key":"e_1_3_2_1_14_1","doi-asserted-by":"publisher","DOI":"10.1145\/1008992.1009027"},{"key":"e_1_3_2_1_15_1","doi-asserted-by":"publisher","DOI":"10.1109\/69.824599"},{"key":"e_1_3_2_1_16_1","doi-asserted-by":"publisher","DOI":"10.1145\/1008992.1009026"},{"key":"e_1_3_2_1_17_1","doi-asserted-by":"publisher","DOI":"10.1109\/ICTAI.2006.63"},{"key":"e_1_3_2_1_18_1","doi-asserted-by":"publisher","DOI":"10.1145\/290941.291008"},{"key":"e_1_3_2_1_19_1","first-page":"464","volume-title":"ACL","author":"Riezler S.","year":"2007","unstructured":"S. Riezler , A. Vasserman , I. Tsochantaridis , V. O. Mittal , and Y. Liu . Statistical machine translation for query expansion in answer retrieval . In ACL , pages 464 -- 471 , 2007 . S. Riezler, A. Vasserman, I. Tsochantaridis, V. O. Mittal, and Y. Liu. Statistical machine translation for query expansion in answer retrieval. In ACL, pages 464--471, 2007."},{"key":"e_1_3_2_1_20_1","first-page":"109","volume-title":"TREC","author":"Robertson S.","year":"1994","unstructured":"S. Robertson , S. Walker , S. Jones , M. Hancock-Beaulieu , and M. Gatford . Okapi at trec-3 . In TREC , pages 109 -- 126 , 1994 . S. Robertson, S. Walker, S. Jones, M. Hancock-Beaulieu, and M. Gatford. Okapi at trec-3. In TREC, pages 109--126, 1994."},{"key":"e_1_3_2_1_21_1","doi-asserted-by":"publisher","DOI":"10.1145\/505282.505283"},{"key":"e_1_3_2_1_22_1","first-page":"57","volume-title":"HLT-NAACL","author":"Soricut R.","year":"2004","unstructured":"R. Soricut and E. Brill . Automatic question answering: Beyond the factoid . In HLT-NAACL , pages 57 -- 64 , 2004 . R. Soricut and E. Brill. Automatic question answering: Beyond the factoid. In HLT-NAACL, pages 57--64, 2004."},{"key":"e_1_3_2_1_23_1","first-page":"42","volume-title":"TREC","author":"Voorhees E. M.","year":"2001","unstructured":"E. M. Voorhees . Overview of the trec 2001 question answering track . In TREC , pages 42 -- 51 , 2001 . E. M. Voorhees. Overview of the trec 2001 question answering track. In TREC, pages 42--51, 2001."},{"key":"e_1_3_2_1_24_1","doi-asserted-by":"publisher","DOI":"10.1145\/1571941.1571975"},{"key":"e_1_3_2_1_25_1","doi-asserted-by":"publisher","DOI":"10.1145\/1390334.1390416"},{"key":"e_1_3_2_1_26_1","doi-asserted-by":"publisher","DOI":"10.1145\/984321.984322"}],"event":{"name":"CIKM '09: Conference on Information and Knowledge Management","location":"Hong Kong China","acronym":"CIKM '09","sponsor":["SIGWEB ACM Special Interest Group on Hypertext, Hypermedia, and Web","SIGIR ACM Special Interest Group on Information Retrieval"]},"container-title":["Proceedings of the 18th ACM conference on Information and knowledge management"],"original-title":[],"link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1645953.1645989","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.1145\/1645953.1645989","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T12:41:09Z","timestamp":1750250469000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1645953.1645989"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,11,2]]},"references-count":26,"alternative-id":["10.1145\/1645953.1645989","10.1145\/1645953"],"URL":"https:\/\/doi.org\/10.1145\/1645953.1645989","relation":{},"subject":[],"published":{"date-parts":[[2009,11,2]]},"assertion":[{"value":"2009-11-02","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}