About: http://webisa.webdatacommons.org/202807767

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	However, environmental studies related to air pollution are more complex and must separate out contaminants from indoor cooling/heating systems, environmental tobacco smoke, urban air pollution, and other sources.
http://www.w3.org/ns/prov#wasQuotedFrom	cdc.gov