Complex sentence: The flag of the Buryat Republic, a federal subject of Russia, is a tricolour consisting of 2:1:1 horizontal bands of blue, white, and yellow with a yellow Mongol device on the hoist of the blue band.
Split into simpler sentences: The flag of Buryatia is used by the Buryat Republic, a federal subject of Russia. It is a tricolour consisting of 2:1:1 horizontal bands of blue, white and yellow with a yellow Mongol device on the hoist of the blue band.