(S (S (PP (VBG According) (PP (TO to) (BASENP (NNS officials)))) (COMMA ,) (S (NP (EX there)) (VP (VBP are) (NP (NP (BASENP (NNS thousands)) (PP (IN of) (BASENP (NNS weapons)))) (SBAR (WHNP (WDT that)) (S (VP (MD could) (VP (VB be) (VP (VBN retired) (COMMA ,) (PP (ADVP (RB largely)) (PP (IN by) (S (VP (VBG eliminating) (NP (BASENP (NNS those)) (VP (ADVP (RB currently)) (VBN stored)))))))))))))))) (PERIOD .))