Assertion: nebula's star | /r/CapableOf | run near the end of its life cycle
Facets:
value: out of fuel
type: CAUSE
Source sentences:
text: Like other planetary nebulae, MyCn18 was formed when a star with a mass up to eight times that of the Sun ran out of fuel near the end of its life cycle, evolved into a red giant, and expelled its outer shells, starting to lose mass.