(S (S (NP (BASENP (NNS Supporters)) (SBAR (WHNP (WP who)) (S (VP (VBP include) (NP (BASENP (DT the) (NN majority)) (PP (IN of) (BASENP (DT the) (JJ main) (NN opposition) (NN party)))))))) (COMMA ,) (VP (VBP argue) (SBAR (IN that) (S (PP (IN because) (PP (IN of) (NP (NP (BASENP (DT the) (NN proliferation)) (PP (IN of) (BASENP (JJ nuclear) (NNS weapons)))) (CC and) (NP (BASENP (NNS threats)) (PP (IN from) (NP (BASENP (NNS countries)) (PP (JJ such) (PP (IN as) (NP (BASENP (NNP Iran)) (CC and) (BASENP (NNP North) (NNP Korea))))))))))) (COMMA ,) (S (BASENP (NNP Britain)) (VP (MD must) (VP (VB have) (BASENP (DT a) (JJ nuclear) (NN defense) (NN capability))))))))) (PERIOD .))