What color is the bus to the left of the fence?
The bus is green.
    src        edge_attr  dst
0     0   to the left of   18
1     0   to the left of    6
2     0   to the left of    4
3     0   to the left of   13
4     0   to the left of   11
5     2  to the right of   10
6     2   to the left of   17
7     4  to the right of    0
8     4   to the left of   17
9     4  to the right of    9
10    5   to the left of   17
11    6  to the right of    0
12    6   to the left of   11
13    6   to the left of   10
14    6   to the left of   18
15    6   to the left of   13
16    9   to the left of    4
17   10  to the right of   11
18   10  to the right of    6
19   10   to the left of    2
20   10  to the right of   13
21   10  to the right of   18
22   11  to the right of    0
23   11  to the right of    6
24   11   to the left of   10
25   11  to the right of   13
26   11  to the right of   18
27   13  to the right of    6
28   13   to the left of   10
29   13   to the left of   18
30   13   to the left of   11
31   13  to the right of    0
32   17  to the right of    5
33   17  to the right of    4
34   17  to the right of    2
35   18  to the right of    6
36   18  to the right of    0
37   18  to the right of   13
38   18   to the left of   11
39   18   to the left of   10