(S (S (NP (BASENP (NNP Australia)) (PRN (COMMA ,) (SBAR (WHNP (WP who)) (S (VP (VBP are) (NP (BASENP (DT the) (NN world) (NNS champions)) (PP (IN in) (BASENP (DT the) (NN 50) (NN over) (NN format))))))) (COMMA ,))) (VP (VBD struggled) (PP (IN against) (NP (NP (DT some) (BASENP (JJ good) (NN fielding) (CC and) (NN bowling))) (PP (IN from) (BASENP (NNP Zimbabwe))))))) (PERIOD .))