The heating also causes the air to expand, to become less dense, and to rise.
(the air; to to become; less dense) (The heating; causes; the air to expand, to become less dense, and to rise) Context(The heating causes,List([0, 23))):(the air; to expand; )
The heating causes,List([0, 23))
the air The heating the air
to to become causes to expand
less dense
the air to expand, to become less dense, and to rise