Assertion: pigeon's bird | /r/HasProperty | descended
Facets:
value: from animals
type: OTHER
value: from birds
type: OTHER
value: from primitive reptiles
type: OTHER
Source sentences:
text: Both birds and mammals are descended from primitive reptiles that lived around 300 million years ago.
text: (Even flightless birds such as ostriches are descended from birds that could fly.)
text: However, all birds – even flightless birds such as penguins and ostriches – are descended from animals that could fly, and their bodies reflect the adaptations required for flight.