Complex sentence: Benítez Rexach was a personal friend of Pedro Albizu Campos president of the Puerto Rican Nationalist Party and a firm believer of the Puerto Rican independence movement.
Split into simpler sentences: Benítez Rexach was a passionate Puerto Rican patriot and a personal friend of Pedro Albizu Campos president of the Puerto Rican Nationalist Party. He was a firm believer of the Puerto Rican independence movement.