Is the color of the train the same as the train car?
Yes, both the train and the train car are white.
    src        edge_attr  dst
0     1   to the left of    7
1     1  to the right of   15
2     2  to the right of   15
3     2             near   14
4     3  to the right of   16
5     4   to the left of   13
6     4   to the left of    6
7     6  to the right of   13
8     6  to the right of    4
9     6  to the right of    8
10    6  to the right of   10
11    7  to the right of    1
12    8   to the left of    6
13    8   to the left of   10
14    8  to the right of   13
15    8   to the left of   11
16    9   to the left of   17
17   10  to the right of   13
18   10   to the left of   11
19   10   to the left of    6
20   10  to the right of    8
21   11         close to   10
22   11  to the right of   13
23   11  to the right of    8
24   11  to the right of   10
25   13   to the left of    8
26   13   to the left of   11
27   13   to the left of    6
28   13   to the left of   10
29   13  to the right of    4
30   14   to the left of   16
31   14          next to    2
32   14             near    2
33   15   to the left of    1
34   15   to the left of    2
35   16  to the right of   14
36   16   to the left of    3
37   17  to the right of    9