Do you see any people in front of the fence?
No, the person is behind the fence.
    src        edge_attr  dst
0     0  to the right of   19
1     0  to the right of    2
2     0  to the right of    1
3     0  to the right of   15
4     0  to the right of    3
..  ...              ...  ...
73   19   to the left of   18
74   21  to the right of    1
75   21  to the right of    2
76   21  to the right of   12
77   21  to the right of   15

[78 rows x 3 columns]