sentences:  In 1889 Argentina was in the second year of a severe economic crisis that had caused a sharp drop in wages, increased unemployment, and an unprecedented number of strikes.President Julio Argentino Roca was succeeded by his brother-in-law, Miguel Juárez Celman, whose administration was characterized by authoritarian tactics and denunciations of corruption.Among its opponents Celman's government was nicknamed "el Unicato", "the Autocracy".