About: http://webisa.webdatacommons.org/3478515

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	If a gas is too persistent, it may remain dangerous after its objective has been achieved (chlorine lurking in ditches and other low places is an example).
http://www.w3.org/ns/prov#wasQuotedFrom	du.edu