Assertion: periwinkle's shell | /r/HasProperty | brown
Facets:
value: typically
type: DEGREE
value: in coloration
type: OTHER
value: to brownish-gray
type: OTHER
Source sentences:
text: They have a shell that is smooth and brown to brownish-gray in coloration and up to about 1 inch long.
text: The shells may be white, yellow, or brown to black, and are about 1/10 to 2/5 inch in diameter.
text: Spiral shell is typically black, brown, or gray