Complex sentence: John Michael Croft, OBE (8 March 1922--15 November 1986) was a British actor, ex-schoolteacher and writer who founded, and was thereafter the lifelong director of, The National Youth Theatre of Great Britain.
Split into simpler sentences: John Michael Croft, OBE (8 March 1922--15 November 1986) was an English actor, ex-schoolteacher, and writer. He founded, and was the lifelong director of, The National Youth Theatre of Great Britain.