Task: Question Generation
Input (English): Passage: The Russian Naval Aviation  is the air arm of the Russian Navy, having superseded Soviet Naval Aviation. The Russian Navy is divided into four fleets and one flotilla: Northern Fleet, Pacific Ocean Fleet, Baltic Fleet, Black Sea Fleet, and Caspian Flotilla. The air forces of the most important fleets, the Northern and Pacific fleets, operate long range Tu-142 anti-submarine warfare  aircraft and Il-38 medium-range ASW aircraft. Formations operating supersonic Tu-22M3 bombers were transferred to the Russian Air Force's Long Range Aviation in 2011. The relatively small fleets, the Baltic and Black Sea, currently have only tactical Su-24 bombers and ASW helicopters in service. The small Caspian Flotilla operates An-26 and Mi-8 transports, Ka-27PS rescue helicopters, as well as some Ka-29 and Mi-24 armed helicopters. In 2011, the Russian Navy Deputy Commander-in-Chief for Naval Aviation and Air Defense/Commander, Naval Air and Air Defense Forces is Major General Igor Kozhin.
Output (English): How many different air transports did the Caspian Flotilla operate?