(S (S (S (BASENP (NNS Bush-fires)) (VP (VBP are) (NP (BASENP (JJ annual) (NNS occurrences)) (PP (IN in) (BASENP (NNP Australia)))))) (CONJP (COMMA ,) (CC but)) (S (BASENP (DT these) (NNS fires)) (VP (VBP have) (VP (VBN been) (NP (NP (BASENP (DT the) (JJS worst)) (PP (IN in) (NP (BASENP (NNS terms)) (PP (IN of) (BASENP (NNS deaths)))))) (PP (IN since) (NP (BASENP (DT the) (NNP Ash) (NNP Wednesday) (NNS fires)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBD killed) (BASENP (NN 28) (NNS people))) (PP (IN in) (BASENP (NNP South) (NNP Australia))))))))))))) (PERIOD .))