Assertion: bufflehead | /r/AtLocation | northern illinois
Facets:
value: occasionally
type: DEGREE
value: for the winter
type: TEMPORAL
Source sentences:
text: Occasionally, buffleheads will remain in northern Illinois for the winter, but most are gone by early December and won't be back until March, when the ice begins to melt and the aquatic critters below awaken from their winter snooze.