About: http://webisa.webdatacommons.org/51993772

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	TREC 2008 has five tracks including one on blogs that includes tasks such as detecting blog posts that express positive or negative opinions on a subject.
http://www.w3.org/ns/prov#wasQuotedFrom	nist.gov