Assertion: nebula's layer | /r/HasProperty | ejected into space
Facets:
value: in a supernova explosion
type: TEMPORAL
value: while the inner core contracts
type: TEMPORAL
Source sentences:
text: Stars explode when they run out of fuel to keep from collapsing into themselves; their outer layers are ejected into space in a supernova explosion, creating a nebula, while the inner core contracts to form a neutron star.