Complex sentence: Alain Decaux, born on 23 July 1925 in Lille, France and dead on 27 March 2016 in Paris, France was a historian by profession, he was elected to the Académie française on 15 February 1979.
Split into simpler sentences: Alain Decaux, born on 23 July 1925 in Lille, France and dead on 27 March 2016 in Paris, France was a historian by profession. He was elected to the Académie française on 15 February 1979.