Original sentence: Fidel Alejandro Castro Ruz (born August 13, 1926) has held the highest political authority in Cuba since 1959, when, leading the 26th of July Movement, he overthrew the regime of Fulgencio Batista, and transformed Cuba into the first Communist state in the Western Hemisphere
Edited sentence: Fidel Alejandro Castro Ruz (born August 13, 1926) has been dictator of Cuba since 1959, when, leading the 26th of July Movement, he overthrew the regime of Fulgencio Batista, and transformed Cuba into the first Communist state in the Western Hemisphere