Is the bike to the left or to the right of the van?
The bike is to the left of the van.
    src        edge_attr  dst
0     0  to the right of   12
1     2   to the left of    9
2     2   to the left of    3
3     3               on    4
4     3  to the right of   12
5     3  to the right of    2
6     3     driving down    4
7     3  to the right of    5
8     5   to the left of    3
9     9  to the right of    2
10   12   to the left of    0
11   12   to the left of    3