Is the large vehicle to the left or to the right of the bench?
The train is to the left of the bench.
    src        edge_attr  dst
0     0   to the left of    9
1     1  to the right of   15
2     1  to the right of    9
3     1   to the left of   13
4     1   to the left of    4
..  ...              ...  ...
81   15   to the left of    8
82   16   to the left of    9
83   16   to the left of   15
84   17   to the left of   15
85   17   to the left of    9

[86 rows x 3 columns]