We have three blocks, called AAA, BBB and CCC. Block AAA contain a medium yellow square and a medium black square. This block covers another medium black square. To the north of and in front of block BBB is this block. North of, disconnected from and in front of block CCC there is block BBB. Block CCC covers a medium blue square and has another medium blue square.
Is a medium blue square to the south of any thing?