(S (S (BASENP (NNP Dr) (NNP Green)) (VP (VBD said) (SBAR (S (S (NP (BASENP (DT an) (NN energy) (NN debate)) (PP (IN in) (BASENP (NNP Australia)))) (VP (VBD was) (ADJP (JJ necessary)))) (CONJP (COMMA ,) (CC but)) (S (BASENP (PRP it)) (VP (VBD had) (S (VP (TO to) (VP (VB go) (PP (IN beyond) (BASENP (RB just) (DT the) (JJ nuclear) (NN alternative)))))))))))) (PERIOD .))