Is that a train or a truck?
That is a truck.
    src        edge_attr  dst
0     1  to the right of    5
1     1  to the right of    3
2     1  to the right of    4
3     2   to the left of    3
4     2   to the left of   11
5     2   to the left of    7
6     3            below   10
7     3  to the right of    7
8     3   to the left of    5
9     3   to the left of   13
10    3  to the right of    2
11    3   to the left of    1
12    4   to the left of    1
13    4   to the left of    5
14    5  to the right of    4
15    5  to the right of    3
16    5   to the left of    1
17    7   to the left of    3
18    7  to the right of    2
19    7   to the left of   11
20    7   to the left of   10
21    8  to the right of   10
22    8  to the right of    9
23    9   to the left of    8
24   10   to the left of    8
25   10            above    3
26   10  to the right of    7
27   11  to the right of    7
28   11  to the right of    2
29   13  to the right of    3
30   14            below    3