Complex sentence: Stanley appears as a character in Simon Gray's 1978 play "The Rear Column", which tells the story of the men left behind to wait for Tippu Tib while Stanley went on to relieve Emin Pasha.
Split into simpler sentences: Stanley appears as a character in Simon Gray's 1978 play "The Rear Column". The play tells the story of the men left behind to wait for Tippu Tib while Stanley went on to relieve Emin Pasha.