About: http://webisa.webdatacommons.org/454070503

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	On: 03/19/2012 Air is a mixture of oxygen, hydrogen, carbon dioxide, helium, nitrogen, and other gases.
http://www.w3.org/ns/prov#wasQuotedFrom	nps.gov