Assertion: foam | /r/CapableOf | turn brown
Facets:
value: over time
type: TEMPORAL
value: often
type: TEMPORAL
value: generally
type: DEGREE
Source sentences:
text: When it first appears, foam can be white, but generally turns brown over time.
text: Most foam is very light, white to start with, often turning brown after a period of time if sediment builds up and forms discernible lines as individual mats accumulate.