PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • An ???agent??? to which an individual has a toxicological response can also be any substance to which an individual exhibits a toxicological response and includes, but is not limited to, drugs, pharmaceutical compounds, household chemicals, industrial chemicals, environmental chemicals, and other chemicals and compounds to which individuals may be exposed.
http://www.w3.org/ns/prov#wasQuotedFrom
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