Complex sentence: Brazil also has the largest hydroelectric power plant in operation in the world, the Itaipú Dam which was built from 1975 to 1991, in a joint development on the Paraná River.
Split into simpler sentences: Brazil also has the largest hydroelectric power plant in operation in the world, the Itaipú Dam. Built from 1975 to 1991, in a joint development on the Paraná River.