(S (S (BASENP (EX There)) (VP (VBZ is) (S (VP (TO to) (VP (VP (VB be) (NP (NP (DT a) (BASENP (QP (NN A$) (NN 60) (NN billion)) (NN write))) (ADVP (RB down)))) (PP (IN over) (BASENP (NN four) (NNS years)))))))) (PERIOD .))