(S (S (BASENP (NNS Officials)) (VP (VBP say) (SBAR (S (BASENP (DT the) (NNS rods)) (VP (MD could) (VP (VB be) (ADJP (JJ able) (S (VP (TO to) (VP (VB provide) (NP (BASENP (JJ enough) (NN plutonium)) (S (VP (TO to) (VP (VB make) (BASENP (NN two) (JJ nuclear) (NNS bombs)))))))))))))))) (PERIOD .))