(S (S (BASENP (DT The) (NNP U.S.) (JJ armed) (NNS forces)) (VP (VP (VP (VBD detained) (NP (BASENP (NN five) (NNS Iranians)) (VP (VBG working) (PP (IN at) (NP (NP (DT a) (QT (DQL ``) (BASENP (NN liaison) (NN office)) (DQR ''))) (ADJP (JJ located) (PP (IN in) (NP (BASENP (NNP Erbil)) (COMMA ,) (BASENP (NNP Iraq)))))))))) (PP (IN before) (BASENP (NN dawn)))) (PP (IN on) (BASENP (NNP Friday))))) (PERIOD .))