PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Another source could be related to fluid circulation through warm ocean crust at spreading ridges where black smokers" and other hydrothermal vents are present.
http://www.w3.org/ns/prov#wasQuotedFrom
  • phys.org