(S (S (BASENP (NNS Witnesses)) (VP (VP (VP (VBD heard) (BASENP (NNS gunshots))) (PP (IN in) (NP (NP (BASENP (DT a) (NNP Wal-Mart) (NN parking) (NN lot)) (PP (IN in) (NP (BASENP (NNP Cedar) (NNP Park)) (COMMA ,) (BASENP (NNP Texas))))) (COMMA ,) (PP (IN near) (BASENP (NNP Highway) (NNP 183)))))) (COMMA ,) (PP (IN on) (BASENP (NNP Sunday) (NN morning))))) (PERIOD .))