We have two blocks. Lets call them A and B. There is a medium black triangle in block A. A medium yellow square is also in this block. Touching, near to and to the left of the medium black triangle is the medium yellow square. This block also has a big black square. Block B is to the right of block A. It contains one medium black square and a big blue triangle. The medium black square is to the left of and below the big blue triangle.
What is to the left of the medium black square? a yellow square or a medium black triangle?
yellow square  medium black triangle  both of them none of them