Assertion: popcorn's kernel | /r/HasProperty | firm
Facets:
Source sentences:
text: You can harvest your hickory king sweet corn when the kernels are still in the “milk” stage, meaning that the kernels are firm but are easily punctured with your thumbnail.
text: When field corn is ripe, the kernels are hard, firm, and starchy.
text: When the corn is ready to be harvested, wait until the husks are completely green and check to make sure the kernels are firm and dry.