Complex sentence: RCAF Station Kingston, or RCAF Aerodrome Kingston, was built in 1940 at Collins Bay near Kingston, Ontario, Canada and was a Second World War training station initially operated by the Royal Air Force (RAF).
Split into simpler sentences: RCAF Station Kingston was a Second World War air training station built in 1940 at Collins Bay near Kingston, Ontario, Canada. The station was originally built by the Royal Canadian Air Force (RCAF) for use by the Royal Air Force (RAF).