Do you see either trains or cars in this scene?
Yes, there is a train.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of    7
2     0   to the left of   10
3     0   to the left of    8
4     1  to the right of    3
5     1   to the left of    2
6     1  to the right of    8
7     2   to the left of    5
8     2  to the right of    1
9     2  to the right of    7
10    3   to the left of    7
11    3   to the left of    4
12    3   to the left of   10
13    3   to the left of   11
14    3   to the left of    1
15    4  to the right of    8
16    4  to the right of    3
17    4  to the right of   12
18    4  to the right of    0
19    5  to the right of    2
20    7  to the right of    3
21    7   to the left of    9
22    7   to the left of   11
23    7  to the right of    8
24    7   to the left of    2
25    7  to the right of    0
26    8   to the left of    4
27    8  to the right of    0
28    8   to the left of    1
29    8   to the left of   10
30    8   to the left of    7
31    8  to the right of   12
32    9  to the right of    7
33    9  to the right of   11
34   10  to the right of   12
35   10  to the right of    8
36   10  to the right of    3
37   10  to the right of    0
38   11   to the left of    9
39   11  to the right of    3
40   11  to the right of    7
41   12   to the left of    4
42   12   to the left of    8
43   12   to the left of   10