Complex sentence: The site chosen for the construction of the purpose-built exhibition halls was the present-day White City retail park, then the Royal Botanical Gardens, and amusements such as toboganning slides and a sports arena were also provided.
Split into simpler sentences: The site chosen for the construction of the purpose-built exhibition halls was the present-day White City retail park, then the Royal Botanical Gardens. Amusements such as toboganning slides and a sports arena were also provided.