8Etzioni O,Cafarella M,Downey D.Web-scale information extraction in knowItAll(premaliminary results)[C]//Proceedings of the 13th International Conference on World Wide Web(WWW2004),New York, 2004.
9Banko M,Cafarella,M J.Open information extraction from the Web[C]// Proceedings of the 20th International Joint Conferences on Artificial Intelligence,2007.
10Pasca M,de Kang Lin.Organizing and searching the World Wide Web of facts-step one:the one-million fact extraetion challenge[C]// Proeeedings of the 21st National Conferenee on Artificial Intelligence, 2006.