(S (S (BASENP (NNS Police)) (VP (VBP say) (SBAR (S (BASENP (PRP it)) (VP (VBZ is) (ADJP (ADJP (RB too) (JJ early)) (S (VP (TO to) (VP (VB tell) (SBAR (WHNP (WP who)) (S (VP (VBZ is) (PP (IN behind) (BASENP (DT the) (NN threat))))))))))))))) (PERIOD .))