We have three blocks. Lets call them A, B and C. Block B is below C. Block C is above A. Block A contains one big blue triangle. Block B has a small black triangle. Above and to the left of a big black square is the small black triangle. And block C contains a medium black square and one medium yellow triangle. It also contains one small black triangle. The medium black square is to the left of, below and near to the medium yellow triangle which is to the right of and below the small black triangle.
What is to the left of the big black square? a small black triangle or a medium yellow triangle?
small black triangle  medium yellow triangle  both of them none of them