(S (S (BASENP (JJ Many) (NNS nations)) (VP (VBD offered) (NP (BASENP (NNS emissions) (NNS cuts) (NNS pledges)) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VP (VBP vary) (PP (IN from) (BASENP (NN 4) (NN %)))) (PP (TO to) (NP (NP (BASENP (NN 17) (NN %) (NNS cuts)) (PP (IN by) (BASENP (NN 2020)))) (COMMA ,) (PP (VBN compared) (PP (IN with) (BASENP (NN 1990) (NNS levels)))))))))))) (PERIOD .))