Complex sentence: Before being incarcerated at Alcatraz in 1936, Young had already served time in State prisons in Montana and Washington entering Federal correctional facilities for the first time in 1935 at the U.S. Penitentiary on McNeil Island, Washington.
Split into simpler sentences: Before being incarcerated at Alcatraz in 1936, Young had already served time in State prisons in Montana and Washington. He entered Federal correctional facilities for the first time in 1935 at the U.S. Penitentiary on McNeil Island, Washington.