(S (S (S (BASENP (NNP Israel)) (VP (ADVP (RB already)) (VP (VBZ has) (BASENP (NN three) (JJR older) (ADJP (JJ nuclear) (JJ weapons-capable)) (NNP Dolphin) (NNS submarines))))) (CC but) (S (S (S (BASENP (DT the) (JJ new) (NNS Dolphins)) (VP (VBP have) (NP (BASENP (NN propulsion) (NNS systems)) (SBAR (WHNP (WDT that)) (S (VP (VBP allow) (S (BASENP (PRP them)) (VP (TO to) (VP (VP (VB remain) (VP (VBN submerged))) (PP (IN for) (NP (BASENP (JJR longer) (NNS periods)) (PP (IN of) (BASENP (NN time)))))))))))))) (COMMA ,) (PP (VBG according) (PP (TO to) (BASENP (DT the) (NNP Jerusalem) (NNP Post))))) (COMMA ,) (S (VP (VBG making) (S (S (BASENP (PRP it)) (ADJP (JJR harder))) (SBAR (IN for) (S (BASENP (PRP them)) (VP (TO to) (VP (VB be) (VP (VBN tracked) (PP (IN by) (BASENP (NN satellite))))))))))))) (PERIOD .))