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create a timeline of the life of muhammad ali.
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1942: born in louisville, kentucky.
1960: won his first professional fight.
1964: won the world heavyweight title.
1966: refused to be drafted into the military, citing religious grounds.
1974: defeated george foreman in the "rumble in the jungle".
1978: lost the world heavyweight title to leon spinks.
1979: retired from boxing.
1996: lit the olympic torch in atlanta.
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