PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Running a PBR is more difficult than using an open pond, and more costly, but may provide a higher level of control and productivity.[37] In addition, a photobioreactor can be integrated into a closed loop cogeneration system much more easily than ponds or other methods.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wikipedia.org