About: http://webisa.webdatacommons.org/2439294

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	Boolean algebra, however, comes from the math world that pre-dates even C :-) And, in fact, the prime notation is used in other places such as matrices where a multiplied by a' gives the unit matrix.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com