About: http://webisa.webdatacommons.org/171069459

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 short null check would not apply to primitives and types like bool?.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com