Assertion: oak's acorn | /r/MadeOf | one seed
Facets:
Source sentences:
text: Each acorn contains one seed (rarely two or three) and takes 6–24 months to mature, depending on their species.
text: The fruit is a nut called an acorn or oak nut borne in a cup-like structure known as a cupule; each acorn contains one seed (rarely two or three) and takes 6–18 months to mature, depending on their species.