(S (S (NP (BASENP (NNP Australia)) (CC and) (BASENP (DT the) (NNP United) (NNPS States))) (VP (VBP are) (NP (BASENP (DT the) (RB only) (JJ developed) (NNS nations)) (SBAR (S (VP (TO to) (VP (VB have) (VP (VBN refused) (S (VP (TO to) (VP (VB sign) (NP (BASENP (DT the) (NNP Kyoto) (NNP Protocol)) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VP (VBZ calls) (PRT (RP on))) (S (BASENP (NNS countries)) (VP (TO to) (VP (VP (VP (VB cut) (BASENP (NN greenhouse) (NNS emissions))) (PP (IN by) (NP (BASENP (NN 5.2) (NN per) (NN cent)) (PP (IN below) (BASENP (NN 1990) (NNS levels)))))) (PP (IN by) (BASENP (NN 2012))))))))))))))))))))) (PERIOD .))