There are two blocks. We call them A and B. Block A contains a medium yellow circle. One big blue triangle and one big black circle are also in this block. The medium yellow circle is above the big black circle and the big blue triangle. To the right of block A there is block B. It contains a medium blue triangle. Below and to the left of a big black triangle there is the medium blue triangle.
What is to the left of the medium blue triangle? a big black triangle or a big blue triangle?
big black triangle  big blue triangle  both of them none of them