Assertion: petrel's rump | /r/HasProperty | white
Facets:
Source sentences:
text: The New Zealand storm petrel is a small seabird, dark brown/black above, except for its white rump.
text: Leach's Storm-Petrel: This medium-sized petrel has a dark brown body and a white rump and under tail feathers.
text: Leach's Storm-Petrel: This medium-sized petrel has a dark brown body and a white rump and under tail feathers.