(S (S (BASENP (DT The) (NN hijacker)) (VP (VBD said) (SBAR (IN that) (S (SBAR (IN if) (S (BASENP (PRPD his) (NN demand)) (VP (VP (VBD was) (RB not)) (VP (VBN met))))) (COMMA ,) (S (BASENP (PRP he)) (VP (MD would) (VP (VP (VB blow) (PRT (RP up))) (BASENP (DT the) (NN plane))))))))) (PERIOD .))