We have two blocks, A and B. One medium black square and a medium blue square are in block A. Below the medium black square and the medium blue square there is a medium yellow square. Below the medium blue square is the medium black square. Below block A there is block B. It contains a medium blue square and a medium yellow square. The medium blue square is below the medium yellow square.
Which object is below a black thing? the medium blue square which is in block A or the medium blue square that is in block B?
the medium blue square  which is in block A the medium blue square  that is in block B both of them none of them