(S (S (ADVP (JJ Prior) (PP (TO to) (BASENP (NNP January) (NN 1)))) (COMMA ,) (S (BASENP (DT a) (JJ global) (NN quota) (NN system)) (VP (VBD helped) (S (VP (VB regulate) (BASENP (DT the) (NN trade))))))) (PERIOD .))