They say that birds evolved from a class of small, feathered carnivorous dinosaurs known as 
(small, feathered carnivorous dinosaurs; known; as) (They; say; that birds evolved from a class of small, feathered carnivorous dinosaurs) Context(They say,List([0, 8))):(birds; evolved; from a class of small, feathered carnivorous dinosaurs)
They say,List([0, 8))
small, feathered carnivorous dinosaurs They birds
known say evolved
as
that birds evolved from a class of small, feathered carnivorous dinosaurs
from a class of small, feathered carnivorous dinosaurs