(S (S (BASENP (DT The) (NNS police)) (VP (VBP claim) (SBAR (S (BASENP (PRP they)) (VP (VP (VBD shot) (PP (IN at) (NP (BASENP (NN eight) (NNS people)) (VP (VBG carrying) (BASENP (NNS guns)))))) (PP (IN on) (BASENP (DT the) (NN bridge)))))))) (PERIOD .))