The Vice President's military aide told us he believed the Vice President spoke to the President just after entering the conference room, but he did not hear what they said.
( ( ( ( ( ( ( The ( Vice ( President 's ) ) ) ( military aide ) ) ( ( told us ) ( he ( believed ( ( the ( Vice President ) ) ( ( spoke ( to ( the President ) ) ) ( just ( after ( entering ( the ( conference room ) ) ) ) ) ) ) ) ) ) ) , ) but ) ( he ( ( did not ) ( hear ( what ( they said ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (NNP Vice) (NNP President) (POS 's)) (JJ military) (NN aide)) (VP (VBD told) (NP (PRP us)) (SBAR (S (NP (PRP he)) (VP (VBD believed) (SBAR (S (NP (DT the) (NNP Vice) (NNP President)) (VP (VBD spoke) (PP (TO to) (NP (DT the) (NNP President))) (PP (RB just) (IN after) (S (VP (VBG entering) (NP (DT the) (NN conference) (NN room))))))))))))) (, ,) (CC but) (S (NP (PRP he)) (VP (VBD did) (RB not) (VP (VB hear) (SBAR (WHNP (WP what)) (S (NP (PRP they)) (VP (VBD said))))))) (. .)))
The military aide believed that he heard a conversation between the Vice President and the President.
( ( The ( military aide ) ) ( ( believed ( that ( he ( heard ( ( a conversation ) ( between ( ( ( the ( Vice President ) ) and ) ( the President ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ military) (NN aide)) (VP (VBD believed) (SBAR (IN that) (S (NP (PRP he)) (VP (VBD heard) (NP (NP (DT a) (NN conversation)) (PP (IN between) (NP (NP (DT the) (NNP Vice) (NNP President)) (CC and) (NP (DT the) (NNP President))))))))) (. .)))