Assertion: hafnium | /r/HasProperty | discovered by dirk coster
Facets:
value: in 1923
type: TEMPORAL
value: in copenhagen
type: LOCATION
Source sentences:
text: Hafnium was discovered by Dirk Coster, a Danish chemist, and George Charles de Hevesy, a Hungarian chemist, in 1923.
text: Hafnium was discovered by Dirk Coster and Georg von Hevesy in 1923 in Copenhagen, Denmark.
text: Hafnium was discovered by Dirk Coster (NL) and George Charles von Hevesy (HU) in 1923.
text: History and Uses:Hafnium was discovered by Dirk Coster, a Danish chemist, and Charles de Hevesy, a Hungarian chemist, in 1923.