About: http://webisa.webdatacommons.org/149182452

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 comparison, the EPA's air quality index rates concentrations of more than 40 ??g/m3 as unhealthy for sensitive groups, such as children and the elderly, and more than 250 ??g/m3 as hazardous" for the general population.
http://www.w3.org/ns/prov#wasQuotedFrom	eurekalert.org