About: http://webisa.webdatacommons.org/388167913

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	Over-writing an uninitialized variable with null would only be problematic if code somewhere else was distinguishing between the two states, so on its own this possibility is an argument against making such a distinction.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com