Assertion: iodine's isotope | /r/HasProperty | generated
Facets:
value: long before
type: TEMPORAL
Source sentences:
text: These two events (supernova and solidification of gas cloud) were inferred to have happened during the early history of the Solar System, as the 129I isotope was likely generated before the Solar System was formed, but not long before, and seeded the solar gas cloud isotopes with isotopes from a second source.