Assertion: cadmium | /r/HasProperty | discovered by friedrich stromeyer
Facets:
value: in 1817
type: TEMPORAL
Source sentences:
text: Cadmium was discovered by Friedrich Stromeyer, a German chemist, in 1817, but it did not become commercially viable for another two decades.
text: Cadmium was discovered by Friedrich Stromeyer in 1817 from an impurity in some samples pf zinc carbonate, ZnCO 3 .