Where is the man standing on?
The man is standing on the train.
    src        edge_attr  dst
0     0  to the right of    4
1     1  to the right of    8
2     1   to the left of   15
3     1   to the left of   17
4     1             near    3
5     1  to the right of    3
6     2      standing on    1
7     2          wearing   13
8     3          next to    1
9     3   to the left of    1
10    3   to the left of   11
11    4   to the left of    0
12    8   to the left of    1
13    8   to the left of   11
14    9   to the left of   16
15   11  to the right of    3
16   11  to the right of   12
17   11  to the right of    8
18   12   to the left of   11
19   15  to the right of    1
20   16  to the right of    9
21   17  to the right of    1