Yusuke Yamamoto Katsumi Tanaka Towards Web Search by Sentence Queries: Asking the Web for Query Substitutions. 83-92 2011 DASFAA (2) http://dx.doi.org/10.1007/978-3-642-20152-3_7 conf/dasfaa/2011-2 db/conf/dasfaa/dasfaa2011-2.html#YamamotoT11