PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The chemical absorption tank 74 usually contains minerals such as limestone or other substances (e.g., activated charcoal, kiln-fired clay beads, wollastonite, taconite tailings) with high surface areas and absorptive characteristics to further remove undesirable compounds from the wastewater being treated.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freepatentsonline.com