About: http://webisa.webdatacommons.org/164033242

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 is probably a typo in the question - but your property returns _Test with an upper case T and sets _test with a lower case t, which would give you these symptoms, especially if _Test is an actual variable you have defined elsewhere..
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com