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<http://webisa.webdatacommons.org/prov/453759590>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/328220800> .
<http://webisa.webdatacommons.org/328220800>	<http://www.w3.org/ns/prov#value>	"Provides a site overview, a chronological and thematic index to his works, biographical and other resources, links to recent news stories from around the world, and free downloads." .
<http://webisa.webdatacommons.org/328220800>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<pbs.org> .