Sixteen seconds after that transmission, ATC instructed the aircraft's pilots to climb to 35,000 feet.
( ( ( Sixteen seconds ) ( after ( that transmission ) ) ) ( , ( ATC ( ( instructed ( ( the ( aircraft 's ) ) ( pilots ( to ( climb ( to ( 35,000 feet ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (NP (NN Sixteen) (NNS seconds)) (IN after) (NP (DT that) (NN transmission))) (, ,) (NP (NNP ATC)) (VP (VBD instructed) (NP (NP (DT the) (NN aircraft) (POS 's)) (NNS pilots) (S (VP (TO to) (VP (VB climb) (PP (TO to) (NP (CD 35,000) (NNS feet)))))))) (. .)))
The aircraft's pilots were told to increase their altitude to 35,000 feet.
( ( ( The ( aircraft 's ) ) pilots ) ( ( were ( told ( to ( ( increase ( their altitude ) ) ( to ( 35,000 feet ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN aircraft) (POS 's)) (NNS pilots)) (VP (VBD were) (VP (VBN told) (S (VP (TO to) (VP (VB increase) (NP (PRP$ their) (NN altitude)) (PP (TO to) (NP (CD 35,000) (NNS feet)))))))) (. .)))