Assertion: world's mammal | /r/HasAspect | 4 legs
Facets:
value: except dolphins
type: OTHER
value: except whales
type: OTHER
value: except manatees
type: OTHER
value: except dugongs
type: OTHER
Source sentences:
text: All mammals have 4 legs except whales, dolphins, dugongs and manatees which have lost their hind limbs in the process of evolution.