Complex sentence: In the mid- 1970s, Innes became closely associated with the TV series "Monty Python's Flying Circus", and played a major role in performing and writing songs and sketches for the final series in 1974 (after John Cleese had left).
Split into simpler sentences: In the mid- 1970s, Innes became closely associated with the TV series "Monty Python's Flying Circus". He played a major role in performing and writing songs and sketches for the final series in 1974 (after John Cleese left).