About: http://webisa.webdatacommons.org/202582091

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	True, we have not brought any samples back except from the Moon, but you do not need to bring a sample back to determine chemical composition.
http://www.w3.org/ns/prov#wasQuotedFrom	slashdot.org