(S (S (PP (VBG According) (PP (TO to) (BASENP (DT a) (NN spokesman)))) (COMMA ,) (S (S (BASENP (DT the) (NN agency)) (VP (ADVP (RB only)) (VP (VBD did) (ADVP (RB so))))) (SBAR (IN after) (S (NP (QTL (DQL ``) (BASENP (DT all))) (NP (QTR (ADJP (JJ possible)) (DQR '')) (NNS options))) (VP (VBD had) (VP (VBN been) (VP (VBN exhausted)))))))) (PERIOD .))