Complex sentence: He was chosen to portray legendary lawman Wyatt Earp on ABC, "The Life and Legend of Wyatt Earp" debuted in 1955 as the "first adult western" and it soon became one of the top-rated shows on television.
Split into simpler sentences: He was chosen to portray legendary lawman Wyatt Earp on ABC, "The Life and Legend of Wyatt Earp" which debuted in 1955. It soon became one of the top-rated shows on television.