(S (S (NP (BASENP (DT The) (NNS pilots)) (PP (IN of) (BASENP (DT the) (JJ German) (NN airforce)))) (VP (VBP have) (VP (VP (VBN made) (S (BASENP (PRP it)) (ADJP (JJ clear)))) (SBAR (IN that) (S (BASENP (PRP they)) (VP (VP (MD wo) (RB n't)) (VP (VP (VP (VB bring) (PRT (RP down))) (BASENP (DT a) (VBN hijacked) (NN plane))) (PP (JJ due) (PP (TO to) (BASENP (JJ fundamental) (ADJP (JJ legal) (CC and) (JJ moral)) (NNS doubts))))))))))) (PERIOD .))