What vehicle is this, a bus or a truck?
This is a truck.
    src        edge_attr  dst
0     0   to the left of    7
1     2  to the right of    7
2     2   to the left of    3
3     2   to the left of   10
4     3  to the right of    9
5     3  to the right of    2
6     3  to the right of    4
7     4   to the left of    3
8     4   to the left of   10
9     7               in    4
10    7   to the left of    2
11    7  to the right of    0
12    7   to the left of    9
13    9  to the right of    7
14    9   to the left of    3
15    9   to the left of   10
16   10  to the right of    4
17   10  to the right of    9
18   10  to the right of    2