The hijackers were wearing red bandanas, and they forced the passengers to the back of the aircraft.
( ( ( ( ( ( The hijackers ) ( were ( wearing ( red bandanas ) ) ) ) , ) and ) ( they ( ( forced ( the passengers ) ) ( to ( ( the back ) ( of ( the aircraft ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (NNS hijackers)) (VP (VBD were) (VP (VBG wearing) (NP (JJ red) (NNS bandanas))))) (, ,) (CC and) (S (NP (PRP they)) (VP (VBD forced) (NP (DT the) (NNS passengers)) (PP (TO to) (NP (NP (DT the) (NN back)) (PP (IN of) (NP (DT the) (NN aircraft))))))) (. .)))
The passengers of the aircraft were forced to the back by the hijackers.
( ( ( The passengers ) ( of ( the aircraft ) ) ) ( ( were ( ( forced ( to ( the back ) ) ) ( by ( the hijackers ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS passengers)) (PP (IN of) (NP (DT the) (NN aircraft)))) (VP (VBD were) (VP (VBN forced) (PP (TO to) (NP (DT the) (NN back))) (PP (IN by) (NP (DT the) (NNS hijackers))))) (. .)))