What is the bench sitting on?
The bench is sitting on the platform.
    src        edge_attr  dst
0     0  to the right of   10
1     0  to the right of    9
2     0  to the right of    6
3     0  to the right of    4
4     0     walking down    9
5     2  to the right of    5
6     2  to the right of    9
7     2  to the right of    3
8     2  to the right of    4
9     3   to the left of    2
10    3   to the left of   18
11    3   to the left of    8
12    3   to the left of   16
13    4   to the left of    2
14    4   to the left of   19
15    4   to the left of   16
16    4   to the left of   11
17    4   to the left of   12
18    4               on    3
19    4   to the left of    0
20    5   to the left of    2
21    5   to the left of   16
22    5   to the left of   12
23    5   to the left of   19
24    5   to the left of   11
25    6   to the left of   10
26    6   to the left of    0
27    7  to the right of   15
28    8  to the right of    3
29    8               on   11
30    9   to the left of   11
31    9   to the left of   16
32    9   to the left of    0
33    9   to the left of    2
34    9   to the left of   19
35   10  to the right of    6
36   10   to the left of    0
37   11  to the right of   17
38   11  to the right of   20
39   11  to the right of    9
40   11  to the right of    4
41   11  to the right of    5
42   12  to the right of    5
43   12  to the right of    4
44   15   to the left of    7
45   16  to the right of    9
46   16  to the right of    3
47   16  to the right of    4
48   16  to the right of    5
49   17   to the left of   19
50   17   to the left of   11
51   18  to the right of    3
52   19  to the right of    9
53   19  to the right of   17
54   19  to the right of    4
55   19  to the right of   20
56   19  to the right of    5
57   20   to the left of   11
58   20   to the left of   19
59   20       sitting on   17