Members of these groups all have a thick layer of blubber that helps keep them warm in cold waters.
(Members of these groups; have; a thick layer of blubber that helps keep them warm in cold waters) (a thick layer of blubber; helps; keep them warm in cold waters) Context(a thick layer of blubber helps,List([33, 68))):(a thick layer of blubber; helps keep; them; in cold waters)
a thick layer of blubber helps,List([33, 68))
Members of these groups a thick layer of blubber a thick layer of blubber
have helps helps keep
a thick layer of blubber that helps keep them warm in cold waters
keep them warm in cold waters
them in cold waters