Complex sentence: In 1902, four years after the Spanish-American War, Dorado was again appended to Toa Baja, but in 1905 it regained its status as an independent town.
Split into simpler sentences: In 1902, four years after the Spanish-American War, Dorado was again appended to Toa Baja. However, in 1905 it regained its status as an independent town.