About: http://webisa.webdatacommons.org/9947700

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	You can do that by matching the characters that are not ! through ~ (i.e. the ASCII characters other than whitespace):
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com