About: http://webisa.webdatacommons.org/449739396

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	Additionally particulate matter such as soot is a byproduct of combustion that can appear concurrently with gases.
http://www.w3.org/ns/prov#wasQuotedFrom	hhs.gov