About: http://webisa.webdatacommons.org/412740500

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	Beginning last year, the center started publishing hourly data on PM2.5, the fine particulate matter that has been shown to cause serious health problems, including heart attacks, strokes and premature death.
http://www.w3.org/ns/prov#wasQuotedFrom	epa.gov