Assertion: nebula's star | /r/CapableOf | expand to red giant
Facets:
Source sentences:
text: After the hydrogen-fusing period of a main-sequence star of low or medium mass ends, such a star will expand to a red giant during which it fuses helium to carbon and oxygen in its core by the triple-alpha process.
text: When it began to run out of fuel, the star expanded into a red giant.