PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Combustible gas sensors for the measurement of high levels of gases such as CO and H2 have been prepared in the past.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com