About: http://webisa.webdatacommons.org/420041648

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	Another definition is a substance where it should not be in high enough levels to have a negative effect on our health or on the health of animals or plants.
http://www.w3.org/ns/prov#wasQuotedFrom	uaf.edu