About: http://webisa.webdatacommons.org/312418882

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	The + indicates covariance, which means that if an A is a B, then a Maybe[A] is also a Maybe[B].
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com