Complex sentence: He also had a parallel career as a stage actor, including as Richard Dazzle in the RSC's 1970 production of "London Assurance"; and received an Olivier Award nomination for his role in Michael Frayn's West End play "Alphabetical Order".
Split into simpler sentences: He also had a parallel career as a stage actor, including as Richard Dazzle in the RSC's 1970 production of "London Assurance". He received an Olivier Award nomination for his role in Michael Frayn's West End play "Alphabetical Order".