(S (S (S (BASENP (JJ New) (NNS plants)) (VP (MD would) (VP (VB have) (BASENP (NN three) (NNS years))))) (SBAR (IN before) (S (BASENP (PRP they)) (VP (VBD were) (VP (VBN obligated) (S (VP (TO to) (VP (VB begin) (S (VP (VBG reducing) (BASENP (PRPD their) (NNS emissions)))))))))))) (PERIOD .))