About: http://webisa.webdatacommons.org/72887506

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	The changes in ?? can be related to the concentration of combustible gases such as hydrogen and carbon monoxide and can be measured to determine concentration.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com