(S (S (BASENP (NN Emergency) (NNS services)) (VP (VBD were) (VP (VP (VBN called) (PP (TO to) (NP (BASENP (NNS reports)) (PP (IN of) (BASENP (DT a) (NN shooting)))))) (PP (IN on) (BASENP (NNP Saturday) (NN morning)))))) (PERIOD .))