PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Creating foams in microgravity is not as straightforward as it might seem ??? scientists mainly know how they form on Earth.
http://www.w3.org/ns/prov#wasQuotedFrom
  • esa.int