About: http://webisa.webdatacommons.org/452002224

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	# if the column is a time set the values to their defaults as January 1, 1970, but only if they are nil
http://www.w3.org/ns/prov#wasQuotedFrom	github.com