<http://webisa.webdatacommons.org/206048668>	<http://www.w3.org/ns/prov#value>	"??? 20 public reading rooms and information centers ??? more than 20 million cataloged books ??? more than 2.8 million audio materials (discs, tapes, talking books, and other recorded formats) ??? more than 14 million visual materials (moving images, photographs, posters, prints, and drawings) ??? more than 4.8 million maps ??? 6 million technical reports, standards, and gray information ??? 70,00" .
<http://webisa.webdatacommons.org/prov/302807056>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/206048668> .
<http://webisa.webdatacommons.org/206048668>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/206048668>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<loc.gov> .