Is the wall behind a girl?
No, the wall is behind a man.
    src        edge_attr  dst
0     0   to the left of   21
1     0  to the right of   18
2     0   to the left of    9
3     0  to the right of    6
4     0  to the right of   13
..  ...              ...  ...
85   20   to the left of   13
86   20   to the left of   12
87   21  to the right of    0
88   21  to the right of    1
89   22   to the left of   17

[90 rows x 3 columns]