Complex sentence: His first important film role was as Helen Keller's older brother James in "The Miracle Worker" (1962) and became somewhat famous playing rodeo rider Andy Guthrie the TV show "Wide Country".
Split into simpler sentences: His first important film role was as Helen Keller's older brother James in "The Miracle Worker" (1962). He became somewhat famous playing rodeo rider Andy Guthrie the TV show "Wide Country".