Assertion: eon | /r/CapableOf | exist besides the phanerozoic
Facets:
value: formerly
type: TEMPORAL
Source sentences:
text: Formerly, only one eon existed besides the Phanerozoic: the Precambrian.
text: Formerly, only one eon existed besides the Phanerozoic: the Precambrian.
text: Formerly, only one eon existed besides the Phanerozoic: the Precambrian.