(S (S (ADVP (BASENP (DT A) (JJ short) (NN time)) (RBR later)) (COMMA ,) (S (NP (BASENP (NN four)) (PP (IN of) (BASENP (DT the) (VBN detained) (NNS men)))) (VP (VBD were) (VP (VBN released) (PP (IN without) (S (VP (VBG being) (VP (VBN charged))))))))) (PERIOD .))