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[2]
Vivisimo customers .2 http://vivisi-mo.com/customers/vivisimo-customers.html . 2011
[3]
AuthorMap:Arts and humanities .2 http://project.cis.drexel.edu/authorlink . 2011
[4]
The START natural language question answering system .2 http://start.csail.mit.edu . 2011

