(S (S (NP (BASENP (NN Seven)) (PP (IN of) (BASENP (DT the) (NN pirate) (NNS gunmen)))) (VP (VP (VBD were) (VP (ADVP (RB temporarily)) (VBN detained))) (CONJP (COMMA ,) (CC but)) (VP (VBD were) (VP (ADVP (RB later)) (VBN released))))) (PERIOD .))