About: http://webisa.webdatacommons.org/109401331

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	Only call srand once in your program, at the beginning of main is a good place, and you will not have this problem.
http://www.w3.org/ns/prov#wasQuotedFrom	cplusplus.com