(S (S (BASENP (DT The) (NN move)) (VP (VBZ comes) (PP (IN as) (NP (BASENP (DT a) (JJ significant) (NN step)) (PP (IN towards) (NP (NP (BASENP (NNP Obama) (POS 's)) (BASENP (VBN stated) (NN goal))) (PP (IN of) (S (VP (VP (VP (VBG reducing)) (CC and) (VP (ADVP (RB eventually)) (VBG ending))) (NP (NP (BASENP (DT the) (NN spread)) (PP (IN of) (BASENP (JJ nuclear) (NNS weapons)))) (ADJP (JJ worldwide)))))))))))) (PERIOD .))