About: http://webisa.webdatacommons.org/240723115

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	Assuming temp is any kind of pointer, !temp forces the coercion of the pointer's value to bool (we want to do this) and negates the result (this is a side effect that we do not want).
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com