System and methods for automatically identifying answerable questions. Yu, H. June, 2006. 00012 US Patent App. 11/479,645
bibtex   
@book{yu_system_2006,
	title = {System and methods for automatically identifying answerable questions},
	author = {Yu, Hong},
	month = jun,
	year = {2006},
	note = {00012 
US Patent App. 11/479,645}
}
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