(S (S (BASENP (DT The) (NNS changes)) (VP (VBP reflect) (NP (BASENP (DT a) (JJ new) (NN focus)) (PP (IN on) (NP (NP (NP (BASENP (NN nonproliferation)) (CC and) (BASENP (NNS arms) (NN control))) (PP (IN by) (BASENP (DT the) (NNP Obama) (NN administration)))) (COMMA ,) (NP (BASENP (NNS policies)) (SBAR (WHNP (WDT that)) (S (VP (VBD were) (VP (ADVP (RB largely)) (VP (VBN dismissed) (PP (IN by) (BASENP (DT the) (NNP Bush) (NN administration)))))))))))))) (PERIOD .))