A medium yellow triangle, a big yellow triangle and a big blue triangle are in a block. The big blue triangle is to the left of and above a medium black triangle. This block also has a medium blue square. This block also has a small blue triangle. It also contains a big blue square. Above the big yellow triangle and the medium black triangle there is the medium yellow triangle. It is touching the right edge of this block. It is to the right of the triangle which is to the left of the medium black triangle.
Which object is to the left of a medium triangle? the big blue triangle or the big yellow triangle?
the big blue triangle  the big yellow triangle  both of them none of them