About: http://webisa.webdatacommons.org/228145756

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	In an urban community site, air usually contains materials such as nitric oxide, sulfur oxide, carbon monoxide, aldehydes, dust and many others.
http://www.w3.org/ns/prov#wasQuotedFrom	globalcommunitywebnet.com