The Vice President was wondering how the hell could a plane hit the World Trade Center when he saw the second aircraft strike the South Tower.
( ( ( The ( Vice President ) ) ( was ( wondering ( how ( ( the hell ) could ) ) ) ) ) ( ( a plane ) ( ( hit ( ( the ( World ( Trade Center ) ) ) ( when ( he ( saw ( ( the ( second aircraft ) ) ( strike ( the ( South Tower ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (S (NP (DT The) (NNP Vice) (NNP President)) (VP (VBD was) (VP (VBG wondering) (SBAR (WHADVP (WRB how)) (S (NP (DT the) (NN hell)) (VP (MD could))))))) (NP (DT a) (NN plane)) (VP (VBD hit) (NP (NP (DT the) (NNP World) (NNP Trade) (NNP Center)) (SBAR (WHADVP (WRB when)) (S (NP (PRP he)) (VP (VBD saw) (SBAR (S (NP (DT the) (JJ second) (NN aircraft)) (VP (VBP strike) (NP (DT the) (NNP South) (NNP Tower)))))))))) (. .)))
The second plane hitting the South Tower answered the Vice President's question.
( ( ( The ( second plane ) ) ( hitting ( the ( South Tower ) ) ) ) ( ( answered ( ( the ( Vice ( President 's ) ) ) question ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ second) (NN plane)) (VP (VBG hitting) (NP (DT the) (NNP South) (NNP Tower)))) (VP (VBD answered) (NP (NP (DT the) (NNP Vice) (NNP President) (POS 's)) (NN question))) (. .)))