Complex sentence: Gregorio Conrado Álvarez Armelino (November 26,1925-December 28,2016) was an Uruguayan army general who served as the de facto president of Uruguay from 1981 until 1985 and was the last surviving President of the civic-military dictatorship of Uruguay.
Split into simpler sentences: Gregorio Conrado Álvarez Armelino (November 26,1925-December 28,2016) was a retired Uruguayan general and former dictator. He served as the de facto president of Uruguay from 1981 until 1985 and was the last surviving President of the civic-military dictatorship of Uruguay.