_:vb50852159	<http://purl.org/net/provenance/ns#accessedService>	<http://speakerdeck.com/z4fkopp900> .
_:vb50852159	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://purl.org/net/provenance/ns#DataAccess> .