Are there trains to the right of the people on the left?
No, there is a man to the right of the people.
    src        edge_attr  dst
0     0   to the left of   17
1     0  to the right of    9
2     0  to the right of   20
3     1      standing on   15
4     1   to the left of   17
..  ...              ...  ...
62   20  to the right of   14
63   20   to the left of    1
64   20  to the right of   10
65   20  to the right of    9
66   20   to the left of    0

[67 rows x 3 columns]