Assertion: black walnut's hull | /r/CapableOf | turn black
Facets:
Source sentences:
text: When the hull of the Black Walnut turns brown, or black that means the walnut is mature, cured-out and ready to harvest, but sometimes hurricane winds cause the nuts to fall off the trees prematurely in the green stage and that reduces the quality of the nuts.
text: Initially, these diseases cause the hull to turn black and soft.