(S (S (BASENP (NNS Police)) (VP (VBP say) (SBAR (S (S (NP (EX there)) (VP (VP (VBD was) (BASENP (DT a) (NN disagreement))) (PP (IN at) (NP (BASENP (DT a) (NN nightclub) (NN birthday) (NN party)) (PP (IN for) (NP (BASENP (NNP Kenyon) (NNP Martin)) (COMMA ,) (NP (BASENP (DT a) (NN forward)) (PP (IN with) (BASENP (DT the) (NNP Denver) (NNPS Nuggets) (NNP National) (NNP Basketball) (NNP Association) (NN team)))))))))) (CONJP (COMMA ,) (CC and)) (S (NP (BASENP (NNP Williams)) (CC and) (BASENP (PRPD his) (NN two) (NNS friends))) (VP (VBD left))))))) (PERIOD .))