(S (S (PP (VBG According) (PP (TO to) (BASENP (DT a) (NNP Navy) (NN news) (NN release)))) (COMMA ,) (S (S (BASENP (DT the) (NNP Blue) (NNPS Angels)) (VP (VBD were) (VP (VBG performing) (NP (BASENP (DT the) (JJ final) (NN maneuver)) (PP (IN of) (BASENP (PRPD their) (NN routine))))))) (SBAR (WHADVP (WRB when)) (S (BASENP (DT the) (NN accident)) (VP (VBD occurred)))))) (PERIOD .))