Complex sentence: Aurelia Vélez Sarsfield was the second daughter of the legislator Dalmacio Vélez Sársfield and her mother was Manuela Velázquez Piñero.
Split into simpler sentences: Aurelia Vélez Sarsfield was the second daughter of the legislator Dalmacio Vélez Sársfield. Her mother was Manuela Velázquez Piñero.