What is on the sidewalk?
The toilet is on the sidewalk.
    src        edge_attr  dst
0     0   to the left of   12
1     1   to the left of   12
2     3  to the right of   13
3     6               on   11
4     6       sitting on   11
5     7   to the left of   12
6     7   to the left of   10
7     7        on top of    6
8     8   to the left of   12
9     9               on    6
10    9        on top of    6
11    9   to the left of   10
12    9   to the left of   12
13   10  to the right of    7
14   10   to the left of   12
15   10  to the right of    9
16   12  to the right of    7
17   12  to the right of    0
18   12  to the right of    1
19   12  to the right of   10
20   12  to the right of    8
21   12  to the right of    9
22   13   to the left of    3