About: http://webisa.webdatacommons.org/158530884

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	If it is deleted out from extconf.rb (both lines 8 and 12), everything works fine, including the tests.
http://www.w3.org/ns/prov#wasQuotedFrom	ruby-lang.org