Assertion: boomerang's number | /r/HasProperty | celebrated in the yabun festival
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Source sentences:
text: A number of Aboriginal festivals are celebrated in Australia, including the Yabun Festival every January 26, sane with Australia Day, Parrtjima Festival, Boomerang Festival and Tjungu Festival in April, A Taste of Kakadu in May, Barunga Festival in June, NAIDOC Week in July, Garma Festival and Darwin Festival in August.