(S (S (BASENP (NNS Experts)) (VP (VP (VBP view) (BASENP (DT the) (NN purchase))) (PP (IN as) (NP (NP (BASENP (DT a) (JJ clear) (NN signal)) (PP (TO to) (BASENP (NNP Iran)))) (SBAR (IN that) (S (S (BASENP (NNP Israel)) (VP (MD can) (VP (VB retaliate)))) (SBAR (IN if) (S (VP (VBN subjected) (PP (TO to) (BASENP (DT a) (JJ nuclear) (NN attack)))))))))))) (PERIOD .))