About: http://webisa.webdatacommons.org/18125838

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	Your case is a special one, the regex in the answer treats each name (last name) as an isolated word in the input string (the test input string has several names) so it does not have the notion of 'end of the name'.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com