Assertion: lanthanide metal | /r/HasProperty | oddity
Facets:
value: until the 1960s
type: TEMPORAL
value: largely
type: DEGREE
Source sentences:
text: The lanthanide metals were largely regarded as oddities until the 1960s when methods were developed to more efficiently separate them from one another.
text: The lanthanide metals were largely regarded as oddities until the 1960s when methods were developed to more efficiently separate them from one another.