At a certain height (dependent on a number of factors) the water vapor condenses, releasing heat which tends to cause the air to keep rising.
(heat; tends; to cause the air to keep rising) (the air; rising; ) (heat; to cause; the air to keep rising) Context(heat to cause,List([92, 117))):(the air; to keep; rising)
heat to cause,List([92, 117))
heat the air heat the air
tends rising to cause to keep
to cause the air to keep rising
the air to keep rising
rising