PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The dangers not directly related to nitrous oxide are mostly present because nitrous oxide is often administered from pressurized containers, without constant oxygen supply, or from sources that may contain contaminants.
http://www.w3.org/ns/prov#wasQuotedFrom
  • drugs-forum.com