Complex sentence: Sir Francis Harry Hinsley OBE (26 November, 1918--16 February, 1998) was an English historian and cryptanalyst who worked at Bletchley Park during the Second World War and wrote widely on the history of international relations and British Intelligence during the Second World War.
Split into simpler sentences: Sir Francis Harry Hinsley OBE (26 November, 1918--16 February, 1998) was an English historian and cryptanalyst. He worked at Bletchley Park during the Second World War and wrote widely on the history of international relations and British Intelligence during the Second World War.