About: http://webisa.webdatacommons.org/287095740

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	I think the best solution to your problem is to define a start and end token for each strings sent to your server.
http://www.w3.org/ns/prov#wasQuotedFrom	codeguru.com