(S (S (S (BASENP (NN Eleven) (NNS people)) (VP (VBP have) (VP (VBN died)))) (SBAR (IN after) (S (BASENP (DT a) (JJ military) (NN helicopter)) (VP (VP (VBD crashed) (PP (IN during) (BASENP (DT an) (JJ anti-narcotics) (NN flight)))) (PP (IN in) (BASENP (NNP Western) (NNP Mexico))))))) (PERIOD .))