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