(S (S (BASENP (NNS Witnesses)) (VP (VBP say) (SBAR (S (BASENP (DT the) (NN aircraft)) (VP (VP (VP (VBP let) (PRT (RP out))) (NP (BASENP (DT a) (JJ loud) (QT (DQL `) (NN bang) (DQR '))) (COMMA ,) (PP (IN with) (BASENP (DT no) (NNS flames))))) (COMMA ,) (VP (ADVP (RB then)) (VP (ADVP (RB slowly)) (VP (VBD descended) (PP (TO to) (BASENP (DT the) (NN sea))))))))))) (PERIOD .))