Assertion: mallard's head | /r/HasProperty | white ring
Facets:
value: at the base of their neck
type: LOCATION
Source sentences:
text: Their heads and necks are bright green, and at the base of their neck is a white ring.
text: The male mallard duck, called a drake, sports a glossy green head, a white ring around its neck and a rich, chestnut-brown breast.
text: Males have an iridescent green head, white ring around the neck, and grayish sides.