PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Drilling pits are earthen-bermed reservoirs on the well pad used for storage of discarded fluids from drilling, fracturing or other processes.
http://www.w3.org/ns/prov#wasQuotedFrom
  • thinkprogress.org