(S (S (PP (IN Under) (NP (BASENP (NNP New) (NNP Zealand) (POS 's)) (BASENP (NN MMP) (NN system)))) (COMMA ,) (S (BASENP (NNS parties)) (VP (MD must) (VP (VP (VB win) (NP (CC either) (NP (BASENP (DT a) (NN electorate) (NN seat)) (CC or) (NP (BASENP (NN 5) (NN %)) (PP (IN of) (BASENP (DT the) (NN party) (NN vote))))))) (S (VP (TO to) (VP (VB win) (NP (BASENP (DT a) (NN seat)) (PP (IN in) (BASENP (DT the) (JJ 120-seat) (COMMA ,) (NN parliament))))))))))) (PERIOD .))