(S (S (S (BASENP (NN Four) (NNS people)) (VP (VBD were) (VP (VBN killed)))) (CC and) (S (BASENP (DT another) (NN 14)) (VP (VBD were) (VP (VBN injured) (PP (IN in) (BASENP (DT the) (NN attack))))))) (PERIOD .))