(S (S (BASENP (NNP North) (NNP Korea)) (VP (MD may) (VP (ADVP (RB already)) (VP (VB have) (NP (BASENP (JJ enough) (NNS materials)) (S (VP (TO to) (VP (VB make) (BASENP (NN six) (JJ nuclear) (NNS bombs)))))))))) (PERIOD .))