Assertion: penguin's bird | /r/HasAspect | hollow bones
Facets:
value: normally
type: DEGREE
Source sentences:
text: Most birds have hollow bones.
text: Birds have hollow bones so they're lighter in the air, but a penguin's bones are thicker and heavier.
text: Unlike birds that have hollow bones making it easy for them to fly, penguins have dense bones.
text: Birds normally have hollow bones, since little weight helps in flying.