What type of details about williamson a. sangma can be gathered from the following bio? Bio: williamson ampang sangma -lrb- 18 october 1919 -- 25 october 1990 -rrb- , a garo leader , was the founder chief minister of meghalaya , twenty-first state in indian union on 21 january 1972 . he was also the first ever governor of mizoram among the garos in 1989 . captain williamson a. sangma was a statesman , tribal leader , and a pioneer in leading the struggle for the creation of meghalaya state , the homeland of three ancient hill communities -- garos , jaintias , and khasis - the khasis and the jaintas are believed to be the remnants of the first mongolian migration into india , while the garos migrated from originally inhabited province torus , tibet .
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