About: http://webisa.webdatacommons.org/397924073

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	However, these detectors cannot discern whether the source of the vapor or gas is local or remote, liquid or gaseous, a change in the normal background, the artifact of an old leak, or naturally occurring materials such as methane.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au