Complex sentence: Born in Coruña del Conde, Marín became the head of his household after his father died and had to take care of his seven brothers and worked as an agricultural laborer, tending his animals and fields.
Split into simpler sentences: Born in Coruña del Conde, Marín became the head of his household after his father died and had to take care of his seven siblings. He worked as an agricultural laborer, tending his animals and fields.