Assertion: asterism's star | /r/CapableOf | stop hydrogen fusion
Facets:
Source sentences:
text: The star is a yellow supergiant that has stopped hydrogen fusion; instabilities in the star cause it to pulsate (change brightness slightly) over a four-day period, putting it in the class of Cepheid variables.
text: The star appears to be close to stopping (or has already stopped) hydrogen fusion.