(S (S (NP (BASENP (DT The) (NNP National) (NNP Weather) (NNP Service)) (PP (IN in) (BASENP (NNP Maine)))) (VP (VBZ says) (SBAR (S (BASENP (PRP it)) (VP (MD will) (VP (VB investigate) (SBAR (SBAR (IN whether) (CC or) (RB not)) (S (BASENP (DT the) (NN storm)) (VP (VBD produced) (BASENP (DT a) (NN tornado))))))))))) (PERIOD .))