Assertion: nickel | /r/HasProperty | recognized as new element
Facets:
value: in 1751
type: TEMPORAL
Source sentences:
text: Nickel was used industrially as an alloying metal almost 2,000 years before it was isolated and recognized as a new element.
text: It was from this ore, studied by Axel Fredrik Cronstedt, that nickel was isolated and recognized as a new element in 1751.