This was United 175's last communication with the ground.
( This ( ( was ( ( ( United ( 175 's ) ) ( last communication ) ) ( with ( the ground ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBD was) (NP (NP (NP (NNP United) (CD 175) (POS 's)) (JJ last) (NN communication)) (PP (IN with) (NP (DT the) (NN ground))))) (. .)))
United 175's communication stopped due to an error.
( ( ( United ( 175 's ) ) communication ) ( ( stopped ( due ( to ( an error ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP United) (CD 175) (POS 's)) (NN communication)) (VP (VBD stopped) (ADJP (JJ due) (PP (TO to) (NP (DT an) (NN error))))) (. .)))