What does the cup stand on top of?
The cup stands on top of the shelf.
    src           edge_attr  dst
0     4     to the right of    6
1     4     to the right of   11
2     4     to the right of    5
3     5      to the left of   11
4     5      to the left of    4
5     6  standing on top of   10
6     6      to the left of    4
7     6      to the left of   11
8     7     to the right of   10
9     8                  on    9
10    8             contain    3
11    8             contain    0
12    8             contain   13
13    9     to the right of   10
14   10      to the left of    9
15   10      to the left of   11
16   10      to the left of    7
17   11     to the right of    5
18   11      to the left of    4
19   11     to the right of   10
20   11     to the right of    6