<http://webisa.webdatacommons.org/297270796>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/257637219>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/297270796> .
<http://webisa.webdatacommons.org/297270796>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/154345799>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/297270796> .
<http://webisa.webdatacommons.org/297270796>	<http://www.w3.org/ns/prov#value>	"The discussion emphasizes the difficulties in making such a comparison and details the types of data that are required." .