Assertion: element cerium | /r/HasProperty | discovered in same year
Facets:
value: by wilhelm von hisinger
type: OTHER
value: by martin klaproth
type: OTHER
value: by jacob berzelius
type: OTHER
Source sentences:
text: It was discovered in 1803 by Jacob Berzelius and Wilhelm von Hisinger and independently in the same year by Martin Klaproth.