U.S. Census http://www.rdfabout.com/rdf/usgov/geo/ http://www.rdfabout.com/sparql http://www.rdfabout.com/rdf/usgov/geo/us yearly U.S. Congress-GovTrack.us http://www.rdfabout.com/rdf/usgov/congress/ http://www.rdfabout.com/sparql http://www.rdfabout.com/rdf/usgov/congress/people/S000583 monthly U.S. SEC http://www.govtrack.us/data/misc/sec.n3.gz http://www.rdfabout.com/rdf/usgov/sec/ http://www.rdfabout.com/sparql http://www.rdfabout.com/rdf/usgov/sec/id/cik0001308161 http://www.rdfabout.com/rdf/usgov/sec/id/cik0001024835 yearly