(S (S (BASENP (DT The) (NN crash)) (VP (VBZ comes) (NP (BASENP (RB just) (NNS days)) (SBAR (IN after) (S (NP (BASENP (DT another) (JJ civilian) (NN helicopter)) (VP (VBN chartered) (PP (IN for) (BASENP (JJ military) (NNS activities))))) (VP (VBD crashed) (PP (IN near) (NP (BASENP (NNP Sangin) (NNP Airbase)) (PP (IN in) (BASENP (NNP Helmand))))))))))) (PERIOD .))