About: http://webisa.webdatacommons.org/42595841

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	Sites mainly used to communicate with friends, such as Facebook and Myspace.
http://www.w3.org/ns/prov#wasQuotedFrom	explainxkcd.com