<http://webisa.webdatacommons.org/prov/302207261>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/146820079> .
<http://webisa.webdatacommons.org/146820079>	<http://www.w3.org/ns/prov#value>	"Polk contain political correspondence, notes, and other papers." .
<http://webisa.webdatacommons.org/146820079>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<congress.gov> .
<http://webisa.webdatacommons.org/146820079>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .