About: http://webisa.webdatacommons.org/441399043

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	If a regex solution is not mandatory, the problem can be solved with a split, a list/set and a contains check, such as is your current code.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com