The flight attendant reported that the flight had been hijacked, both pilots had been killed, a flight attendant had been stabbed, and the hijackers were probably flying the plane.
( ( ( ( ( ( ( ( ( ( The ( flight attendant ) ) ( reported ( that ( ( the flight ) ( had ( been hijacked ) ) ) ) ) ) , ) ( ( both pilots ) ( had ( been killed ) ) ) ) , ) ( ( a ( flight attendant ) ) ( had ( been stabbed ) ) ) ) , ) and ) ( ( the hijackers ) ( ( were probably ) ( flying ( the plane ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (NN flight) (NN attendant)) (VP (VBD reported) (SBAR (IN that) (S (NP (DT the) (NN flight)) (VP (VBD had) (VP (VBN been) (VP (VBN hijacked)))))))) (, ,) (S (NP (DT both) (NNS pilots)) (VP (VBD had) (VP (VBN been) (VP (VBN killed))))) (, ,) (S (NP (DT a) (NN flight) (NN attendant)) (VP (VBD had) (VP (VBN been) (VP (VBN stabbed))))) (, ,) (CC and) (S (NP (DT the) (NNS hijackers)) (VP (VBD were) (ADVP (RB probably)) (VP (VBG flying) (NP (DT the) (NN plane))))) (. .)))
Both pilots put up a heroic struggle before being killed.
( ( Both pilots ) ( ( ( ( put up ) ( a ( heroic struggle ) ) ) ( before ( being killed ) ) ) . ) )
(ROOT (S (NP (DT Both) (NNS pilots)) (VP (VBD put) (PRT (RP up)) (NP (DT a) (JJ heroic) (NN struggle)) (PP (IN before) (S (VP (VBG being) (VP (VBN killed)))))) (. .)))