Complex sentence: The Palacio Haedo is a building on the Avenida Santa Fe in Buenos Aires, Argentina, which was completed in the mid- 19th century as a residence for the well-to-do Haedo family.
Split into simpler sentences: The Palacio Haedo is a 19th century building on the Avenida Santa Fe in Buenos Aires, Argentina. The building was completed in the mid- 19th century as a residence for the well-to-do Haedo family.