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