Dora Brought Plenty is 71. She’s a Standing Rock Sioux, an American Indian who came to Dallas 50 years ago. She’s a self-taught artist — self-taught because when she was a child, raised in a Native boarding school in South Dakota, her art helped her escape repeated beatings. “I learned very quickly that some teachers liked my art,” Brought Plenty said. “And that was what saved me. I could do my art, and I would be kept from being beaten. And that’s what I learned at that school — was fear. " Brought Plenty recently spoke on a panel about...