(S (S (BASENP (DT The) (JJ new) (NN Constitution)) (VP (VP (VP (VBZ sets) (BASENP (NNS limits))) (PP (IN on) (NP (BASENP (DT the) (NN number)) (PP (IN of) (NP (BASENP (JJ presidential) (NNS terms)) (SBAR (S (BASENP (DT a) (NN leader)) (VP (MD can) (VP (VB serve)))))))))) (COMMA ,) (PP (IN in) (NP (BASENP (NN contrast)) (PP (TO to) (NP (BASENP (JJ several) (JJ sub-Saharan) (NNS countries)) (COMMA ,) (SBAR (WHADVP (WRB where)) (S (BASENP (JJ several) (NNS leaders)) (VP (VBP have) (VP (VP (VBN amended) (BASENP (PRPD their) (NNS Constitutions))) (S (VP (TO to) (VP (VB retain) (BASENP (NN power))))))))))))))) (PERIOD .))