About: http://webisa.webdatacommons.org/60986097

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	Eclipse Bug 198630 was raised almost 5 years back and in that there is a comment which has an almost identical error message as the OP. (The bug itself was finally closed as not being reproducible).
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com