Assertion: pigeon | /r/CapableOf | bob their heads
Facets:
value: for depth of perception
type: PURPOSE
value: forward
type: MANNER
Source sentences:
text: Why do pigeons bob their heads?
text: To adjust their view and get an in-depth focus, they have to bob their head.
text: As pigeons have monocular vision rather than binocular vision they bob their heads for depth of perception.
text: Why do pigeons bob their heads?
text: As a pigeons have monocular vision rather than binocular vision they bob their heads for depth of perception.
text: Why do pigeons bob their heads?
text: As pigeons have monocular vision rather than binocular vision they bob their heads for depth of perception.
text: Pigeons generally walk or run while bobbing their heads forward and backward.
text: Pigeons generally walk or run while bobbing their heads forward and backward.