What is Standing Bear famous for?

There is a native American that lived in Nebraska. My sister is trying to figure out what he is famous for. His name is standing bear. He was born in 1829 in Ponca Reservation and he died in September 3, 1908. Any information would be appreciated. PLZ answer ASAP!
Update: *blink* *blink* WOW!! thnx for the info
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