<http://webisa.webdatacommons.org/390143901>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/59177877>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/390143901> .
<http://webisa.webdatacommons.org/390143901>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/390143901>	<http://www.w3.org/ns/prov#value>	"As the user selects categories in the hierarchy, documents and other categories contained in the selected categories are presented to the user." .