Complex sentence: He is often stated to have retired from the acting industry in 1963, however, he was a member of the Actors' Equity Association and performed in many productions after 1963, especially in industrial shows, and performed in Music Circus productions as late as 1975.
Split into simpler sentences: He is often stated to have retired from the acting industry in 1963. However, he was a member of the Actors' Equity Association and performed in many productions after 1963, especially in industrial shows, and performed in Music Circus productions as late as 1975.