PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • And academics routinely look at least a few decades out when considering implications of other people's tech* Helium 3 is not a geological resource, it is believed to be deposited fairly uniformly on Moon's surface by the solar wind, so mining is a matter of gathering the upper layers of lunar dust and processing it to extract helium.
http://www.w3.org/ns/prov#wasQuotedFrom
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