What is located on top of the table?
The tablecloth is on top of the table.
    src        edge_attr  dst
0     0        on top of    1
1     0  to the right of    7
2     0  to the right of    3
3     0  to the right of    9
4     2               of    0
5     3   to the left of    8
6     3   to the left of    0
7     5   to the left of    7
8     7        on top of    1
9     7  to the right of    5
10    7   to the left of    0
11    8  to the right of    3
12    9   to the left of    0
13   10        on top of    4