We have three blocks. Lets call them A, B and C. Block B is below C and block C is below A. Block A has two medium black squares. This block also contains one medium blue square. Below medium black square number two and medium black square number one there is the medium blue square. Below medium black square number two there is medium black square number one. Block B has one medium black square. And block C contains one medium blue square. There is also one medium yellow square in this block. The medium yellow square is below the medium blue square.
What is above the yellow thing? a medium black square number two or a medium black square that is in block B?
medium black square  number two medium black square  that is in block B both of them none of them