Are there mirrors or motorcycles?
Yes, there are motorcycles.
     src        edge_attr  dst
0      0   to the left of   20
1      0  to the right of   30
2      0  to the right of   22
3      0   to the left of    6
4      0   to the left of   19
..   ...              ...  ...
298   36   to the left of    0
299   36  to the right of   11
300   36   to the left of    1
301   36   to the left of   33
302   38               on   10

[303 rows x 3 columns]