(S (S (ADVP (BASENP (NNS Hours)) (RBR later)) (COMMA ,) (S (NP (BASENP (NN two) (NNS suspects)) (PP (IN in) (BASENP (DT the) (NN crime)))) (VP (VBD were) (VP (VP (VBN arrested) (PP (IN by) (BASENP (DT the) (NN police)))) (PP (IN in) (NP (BASENP (DT the) (NN city)) (PP (IN of) (BASENP (NNP El) (NNP Alto))))))))) (PERIOD .))