Is that a truck or a train?
That is a train.
    src        edge_attr  dst
0     0   to the left of    5
1     1               in    3
2     1   to the left of   17
3     1   to the left of   12
4     1  to the right of   13
5     4   to the left of   15
6     4  to the right of   10
7     5  to the right of    0
8     6               in    3
9     8   to the left of   15
10   10   to the left of    4
11   12  to the right of    1
12   12  to the right of   13
13   13   to the left of   12
14   13   to the left of    1
15   15  to the right of    4
16   15             with   14
17   15  to the right of    8
18   17  to the right of    1