We have two blocks, A and B. There are a small yellow triangle, a medium black square and a big black circle in block A. The small yellow triangle is above and to the right of the medium black square which is to the left of, near to and above the big black circle. There is also a big yellow circle touching the bottom edge of this block. Block B is to the left of block A. It contains one small yellow square, one big black triangle and a big yellow square. The small yellow square is above the big yellow square. The big yellow square is touching the bottom edge of this block. The small yellow square is to the left of the big black triangle which is to the right of the big yellow square.
What is to the left of the medium thing? a big black triangle or a small yellow triangle?
big black triangle  small yellow triangle  both of them none of them