(S (S (BASENP (NNS Police)) (VP (VBP are) (VP (VBG requesting) (SBAR (IN that) (S (NP (BASENP (NN anyone)) (SBAR (WHNP (WP who)) (S (VP (VBZ comes) (PP (IN in) (NP (BASENP (NN contact)) (PP (IN with) (BASENP (DT the) (NN suspect))))))))) (VP (VP (VB dial) (BASENP 911)) (CC and) (VP (VB exercise) (BASENP (JJ extreme) (NN caution))))))))) (PERIOD .))