About: http://webisa.webdatacommons.org/328382778

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	Some examples are ammonia, methylamine, chlorine, sulfur dioxide, hydrogen chloride, hydrogen sulfide, formaldehyde, and other types of gases and vapors.
http://www.w3.org/ns/prov#wasQuotedFrom	pitt.edu