Are there any cars to the left of the bus?
Yes, there is a car to the left of the bus.
    src        edge_attr  dst
0     1   to the left of    6
1     1   to the left of   23
2     2   to the left of   21
3     2   to the left of   15
4     3  to the right of    7
..  ...              ...  ...
93   23   to the left of   11
94   23  to the right of    6
95   23   to the left of   15
96   23   to the left of   14
97   23               on   16

[98 rows x 3 columns]