Assertion: pm | /r/AtLocation | earth's crust
Facets:
value: close to its formation
type: TEMPORAL
Source sentences:
text: Promethium may have once existed in Earth's crust close to its formation, but it would have all decayed within 10,000 years, according to Lenntech.
text: Promethium may have once existed in Earth's crust close to its formation, but it would have all decayed within 10,000 years, according to Lenntech.