Assertion: oak's acorn | /r/HasProperty | hemispherical
Facets:
Source sentences:
text: The acorns, borne in a shallow cup, are hemispherical, 0.35–0.5 inches (8.9–12.7 millimetres) long, green, maturing blackish-brown about 18 months after pollination.
text: The acorns, borne in a shallow, thin cap, are hemispherical, 10–16 mm (13⁄ 32 –5⁄ 8 in) long and 9–15 mm (11⁄ 32 –19⁄ 32 in)