(S (S (NP (NP (BASENP (DT The) (ADJP (RB unusually) (JJ high)) (NN number)) (PP (IN of) (BASENP (NNPS Australians)))) (PP (IN amongst) (NP (BASENP (DT the) (NN 140) (NNS passengers)) (PP (IN on) (BASENP (NN board)))))) (VP (VBD was) (ADJP (JJ attributable) (PP (TO to) (NP (BASENP (DT a) (NN visit)) (PP (IN by) (BASENP (NNP Mr) (NNP Downer)))))))) (PERIOD .))