On which side of the picture is the signal light?
The signal light is on the right of the image.
    src        edge_attr  dst
0     0               of   10
1     1   to the left of   22
2     1   to the left of    3
3     1   to the left of    2
4     1   to the left of   17
..  ...              ...  ...
88   28  to the right of   17
89   29   to the left of   25
90   29   to the left of   24
91   29  to the right of    7
92   30               of   31

[93 rows x 3 columns]