(S (S (BASENP (NNP Israel)) (VP (VP (VBZ has) (VP (ADVP (RB never)) (VP (VP (VBN confirmed) (CC nor) (VBN denied)) (SBAR (IN that) (S (BASENP (PRP it)) (VP (VBZ has) (BASENP (JJ nuclear) (NNS weapons)))))))) (CC but) (VP (VBZ is) (VP (VP (VBN believed) (S (VP (TO to) (VP (VB have) (NP (NP (ADJP (BASENP (DT the) (NN world) (POS 's)) (ADJP (JJ sixth) (JJS largest))) (NN stockpile)) (PP (IN of) (BASENP (DT the) (NNS devices)))))))) (COMMA ,) (PP (IN with) (S (BASENP (JJ most) (JJ outside) (NNS estimates)) (VP (VP (VBG putting) (BASENP (PRPD their) (NN stockpile))) (PP (IN in) (BASENP (DT the) (JJ low) (NNS hundreds)))))))))) (PERIOD .))