Is this a bus or a train?
This is a bus.
    src        edge_attr  dst
0     2   to the left of    4
1     2   to the left of   13
2     2  to the right of    8
3     3  to the right of    6
4     4  to the right of    8
5     4  to the right of    2
6     4   to the left of   16
7     4  to the right of   15
8     6   to the left of    3
9     6   to the left of    7
10    6   to the left of   12
11    7  to the right of    6
12    8   to the left of   13
13    8   to the left of   14
14    8   to the left of    4
15    8   to the left of   15
16    8   to the left of   10
17    8   to the left of    2
18   10  to the right of    8
19   12  to the right of    6
20   13  to the right of    8
21   13   to the left of   16
22   13  to the right of   15
23   13  to the right of    2
24   14  to the right of    8
25   14   to the left of   16
26   14          wearing   13
27   15   to the left of   13
28   15  to the right of    8
29   15   to the left of    4
30   16  to the right of    4
31   16  to the right of   14
32   16  to the right of   13