We have three blocks. We call them A, B and C. There are one medium yellow square and one medium black square in block A. Below the medium black square is the medium yellow square. Block B is to the left of block A. It has a medium black square and one medium blue square. The medium black square is below the medium blue square. Above block A there is block C which has a medium black square.
Which object is to the left of a medium square? the medium black square that is in block C or the medium black square which is in block A?
the medium black square  that is in block C the medium black square  which is in block A both of them none of them