Complex sentence: Domingo F. Sarmiento, who was president during the great yellow fever epidemic and the War of Paraguay, events to which is assigned the extermination of the Afro Argentine, had a strong racist position and argued the need to eliminate the black population.
Split into simpler sentences: Domingo F. Sarmiento, was president during the great yellow fever epidemic and the War of Paraguay, events to which is assigned the extermination of the Afro-Argentine. He had a strong racist position and argued the need to eliminate the black population.