Complex sentence: Luís Carlos Prestes (January 3,1898--March 7,1990) was a Brazilian politician and communist militant, one of the organizers of the 1920s "tenente" revolts and the Communist opposition to the dictatorship of Getúlio Vargas in Brazil.
Split into simpler sentences: Luís Carlos Prestes (January 3,1898--March 7,1990) was a Tenente, later communist militant and Brazilian politician. He was one of the organizers of the 1920s "tenente" revolts and the Communist opposition to the dictatorship of Getúlio Vargas in Brazil.