About: http://webisa.webdatacommons.org/248068656

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	It means only the string is an int, it should return true, all the other cases should return false.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com