_:vb913831	<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>	<http://www.w3.org/ns/prov#qualifiedPrimarySource> .
<http://www.w3.org/ns/prov#hadPrimarySource>	<http://www.w3.org/2002/07/owl#propertyChainAxiom>	_:vb913831 .
_:vb913831	<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>	_:vb913830 .