We are returning to the airport.
( We ( ( are ( returning ( to ( the airport ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP are) (VP (VBG returning) (PP (TO to) (NP (DT the) (NN airport))))) (. .)))
We are flying directly to Cuba.
( We ( ( are ( ( flying directly ) ( to Cuba ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP are) (VP (VBG flying) (ADVP (RB directly)) (PP (TO to) (NP (NNP Cuba))))) (. .)))