About: http://webisa.webdatacommons.org/78474389

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	A widely used air quality index, which in the United States rarely goes above 100 and exceeds 300 only during forest fires and other extreme events, approached the 1,000 level in Beijing in early 2013.
http://www.w3.org/ns/prov#wasQuotedFrom	cupblog.org