Assertion: giant's core | /r/CapableOf | become hot
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Source sentences:
text: This continues for several million years before the core becomes hot enough to ignite hydrogen in a shell, which reverses the temperature and luminosity increase and the star starts to expand and cool.
text: The core of the star will become so hot and dense that the leftover helium fuel will no able to star fusing into heavier elements.
text: The core becomes so hot that it may pulsate (vary in brightness).