We have two blocks. We call them A and B. Block A is to the left of B. Block A contains one medium black circle. Block B contains a small yellow triangle, a medium yellow circle and one big blue circle. This block also has one big blue triangle. The small yellow triangle is to the left of the big blue circle and the big blue triangle. To the right of the big blue circle and the big blue triangle is the medium yellow circle.
What is to the left of the medium yellow circle? a big blue circle or a medium black circle?
big blue circle  medium black circle  both of them none of them