About: http://webisa.webdatacommons.org/318881886

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	Additionally, for each input parameter that has a function type, the variance roles are reversed, i.e. each of its input parameters must be covariant and its output must be contravariant.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com