Assertion: walnut's husk | /r/CapableOf | turn brown
Facets:
value: at maturity
type: TEMPORAL
Source sentences:
text: The outer husk is 3–4 mm (1⁄ 8 –5⁄ 32 in) thick, starts out green and turns brown at maturity, at which time it splits off in four sections to release the thin-shelled seed.