Who walks towards the train in the station?
The passengers walk towards the train.
    src        edge_attr  dst
0     0  to the right of    5
1     2  to the right of    9
2     5   to the left of    0
3     7   to the left of    8
4     7   to the left of   10
5     7  to the right of   14
6     7  to the right of   17
7     8  walking towards   18
8     8  to the right of    7
9     8  to the right of   18
10    9   to the left of   19
11    9   to the left of    2
12   10  to the right of   17
13   10  to the right of    7
14   12   to the left of   16
15   12   to the left of   14
16   13   to the left of   14
17   13   to the left of   16
18   14  to the right of   12
19   14  to the right of   16
20   14   to the left of    7
21   14   to the left of   17
22   14  to the right of   13
23   16   to the left of   14
24   16  to the right of   12
25   16   to the left of   17
26   16  to the right of   13
27   17  to the right of   16
28   17   to the left of    7
29   17  to the right of   14
30   17   to the left of   10
31   18      waiting for    8
32   18               in   15
33   18   to the left of    8
34   19  to the right of    9