There are two blocks, A and B. Block A contains two medium black squares. It also has a medium blue square. It is below medium black square number two. Medium black square number one is below the medium blue square and medium black square number two. Above block A we have block B with one medium black square in it. A medium yellow square is below the medium black square.
What is below the yellow thing? a medium black square that is in block B or a medium black square number one?
medium black square  that is in block B medium black square  number one both of them none of them