Assertion: cerium | /r/HasProperty | first of lanthanide
Facets:
value: by wilhelm hisinger
type: OTHER
value: in 1803
type: TEMPORAL
value: in bastnäs
type: LOCATION
value: in the same year
type: TEMPORAL
value: by martin heinrich klaproth in germany
type: LOCATION
value: by jöns jakob berzelius
type: OTHER
Source sentences:
text: Cerium was the first of the lanthanides to be discovered, in Bastnäs, Sweden, by Jöns Jakob Berzelius and Wilhelm Hisinger in 1803, and independently by Martin Heinrich Klaproth in Germany in the same year.