About: http://webisa.webdatacommons.org/386999620

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	so i tested if (string1 isEqualToString:string2) but in that case there is a syntax error
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com