Assertion: popcorn's kernel | /r/HasProperty | heated
Facets:
Source sentences:
text: When the kernel is heated, the moisture turns to steam.
text: A popcorn kernel's strong hull contains the seed's hard, starchy shell endosperm with 14–20% moisture, which turns to steam as the kernel is heated.
text: When a kernel is heated, the moisture inside turns to steam which in turn causes it to POP.