PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • But I suspect the underlying science is a little too complex for you at the moment.Incidentally, the reason we call the element helium what we do, is that it was first discovered in spectrographic studies of the Sun; before it had been chemically isolated for study on Earth.
http://www.w3.org/ns/prov#wasQuotedFrom
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