Are there any trains or buses that are yellow?
Yes, the bus is yellow.
    src        edge_attr  dst
0     0  to the right of   22
1     1  to the right of   17
2     1  to the right of    7
3     1  to the right of    6
4     2   to the left of   20
5     3  to the right of   13
6     4               on    5
7     4   to the left of   11
8     5   to the left of   21
9     5   to the left of   10
10    6   to the left of    1
11    6   to the left of   11
12    6  to the right of   13
13    7   to the left of    1
14    7  to the right of   21
15    7   to the left of   19
16    8  to the right of   18
17   10  to the right of    5
18   10   to the left of   21
19   11  to the right of    6
20   11  to the right of   17
21   11   to the left of   12
22   11  to the right of    4
23   12  to the right of   11
24   13   to the left of    6
25   13   to the left of   24
26   13   to the left of   22
27   13   to the left of    3
28   13   to the left of   23
29   16   to the left of   22
30   17   to the left of   11
31   17   to the left of    1
32   17  to the right of   21
33   17   to the left of   24
34   18   to the left of    8
35   19  to the right of    7
36   20  to the right of    2
37   21   to the left of   24
38   21   to the left of   17
39   21  to the right of   10
40   21  to the right of    5
41   21   to the left of    7
42   22  to the right of   13
43   22   to the left of    0
44   22  to the right of   16
45   23  to the right of   13
46   24  to the right of   13
47   24  to the right of   17
48   24  to the right of   21