PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • According to ASTDR (2005???2007), the most known pollutants in our environment are Cd, Co, Hg, Ni, and Pb.
http://www.w3.org/ns/prov#wasQuotedFrom
  • hindawi.com