What airlines is a spin-off from a carrier that operates mainly from Sheremetyevo Internation Airport?
Vnukovo Airlines: Vnukovo Airlines (Russian: Внуковские авиалинии or "Vnukovskie Aviallnii") is a defunct Russian airline which had its corporate headquarters at Vnukovo International Airport in Moscow. Aeroflot:  The carrier is an open joint stock company that operates domestic and international passenger and services, mainly from its hub at Sheremetyevo International Airport.
i don't know