(S (S (BASENP (DT A) (NNP Greater) (NNP Manchester) (NNP Police) (NN spokeswoman)) (VP (VBD said) (SBAR (S (BASENP (NNS officers)) (VP (VBD were) (VP (ADVP (RB still)) (VP (VBG trying) (S (VP (TO to) (VP (VB establish) (NP (BASENP (DT the) (NNS circumstances)) (PP (IN of) (BASENP (DT the) (NN shooting)))))))))))))) (PERIOD .))