Complex sentence: The zoo opened in an old farmhouse in 1987 as a reptile house, but was expanded in 1992 to include mammals such as monkeys and racoons, and birds including parrots and birds of prey.
Split into simpler sentences: The zoo opened in an old farmhouse in 1987. It was initially just a reptile house, but was expanded in 1992 to include mammals such as monkeys and racoons, and birds including parrots and birds of prey.