PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The simplest examples of alkanes are methane (CH4, the principal constituent of natural gas), ethane (C2H6), propane (C3H8, in wide use as a barbeque fuel) and butane (C4H10, the liquid fuel in pocket lighters).
http://www.w3.org/ns/prov#wasQuotedFrom
  • britannica.com