Is the traffic signal to the right or to the left of the lamp?
The traffic signal is to the left of the lamp.
     src        edge_attr  dst
0      0   to the left of    3
1      0  to the right of    9
2      2  to the right of    9
3      2  to the right of   11
4      2   to the left of   10
..   ...              ...  ...
117   25   to the left of   17
118   25  to the right of   19
119   25   to the left of   22
120   25   to the left of   11
121   25   to the left of    9

[122 rows x 3 columns]