Is there a blue bus or train?
Yes, there is a blue train.
    src        edge_attr  dst
0     1  to the right of    2
1     2   to the left of    1
2     3  to the right of    5
3     3   to the left of   15
4     3  to the right of    6
5     3  to the right of    7
6     5   to the left of   15
7     5   to the left of    3
8     5   to the left of    6
9     5  to the right of    7
10    5   to the left of    8
11    6   to the left of    3
12    6  to the right of    5
13    6  to the right of    7
14    6   to the left of   15
15    7   to the left of    5
16    7   to the left of    3
17    7  to the right of   12
18    7   to the left of    8
19    7  to the right of   14
20    7   to the left of    6
21    8  to the right of    5
22    8   to the left of   15
23    8  to the right of    7
24    8  to the right of   17
25    8  to the right of   11
26   10  to the right of   11
27   10  to the right of   17
28   11   to the left of    8
29   11  to the right of   17
30   11   to the left of   10
31   12   to the left of    7
32   13   to the left of   16
33   13   to the left of   18
34   13   to the left of   14
35   14  to the right of   13
36   14   to the left of    7
37   14        parked in   12
38   14           behind   16
39   14  to the right of   18
40   15  to the right of    5
41   15  to the right of    3
42   15  to the right of    8
43   15  to the right of    6
44   16      in front of   14
45   16  to the right of   13
46   17   to the left of   10
47   17   to the left of   11
48   17   to the left of    8
49   18  to the right of   13
50   18   to the left of   14