'I saw him get aboard myself.
( ' ( I ( ( saw ( him ( get ( aboard myself ) ) ) ) . ) ) )
(ROOT (S ('' ') (NP (PRP I)) (VP (VBD saw) (SBAR (S (NP (PRP him)) (VP (VBP get) (PP (IN aboard) (NP (PRP myself))))))) (. .)))
I saw him get on the train.
( I ( ( saw ( him ( get ( on ( the train ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD saw) (SBAR (S (NP (PRP him)) (VP (VBP get) (PP (IN on) (NP (DT the) (NN train))))))) (. .)))