Complex sentence: Frank attended, and graduated from high school at Wallowa High School in Wallowa, Oregon, as did his brother Amos Marsh, who also went on to play professional football with the Dallas Cowboys and the Detroit Lions.
Split into simpler sentences: Frank attended, and graduated from high school at Wallowa High School in Wallowa, Oregon, as did his brother Amos Marsh. Amos also went on to play professional football with the Dallas Cowboys and the Detroit Lions.