About: http://webisa.webdatacommons.org/21876528

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	h f(x)=c' implies that c is not c', which sounds like there is a x for which f(x) does have two results c and c' which would not be a funtion anymore.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com