About: http://webisa.webdatacommons.org/274913748

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	A while back I had a large project where performance was an absolute must, after months of research we ended up going with a UTC timestamp stored in a varchar field, it proved to be faster and better for our needs (large social network)
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com