Assertion: rhea's leg | /r/CapableOf | keep their head
Facets:
value: at above the ground
type: LOCATION
Source sentences:
text: The long neck and legs keeps their head at 1.8 to 2.75 metres above the ground, and their large eyes which are said to be the largest of any land vertebrate (50 mm in diameter) help them detect predators at a great distance.