Is there a traffic light or a bike in this picture?
Yes, there is a traffic light.
    src        edge_attr  dst
0     0   to the left of   20
1     1   to the left of   17
2     1  to the right of    5
3     2               on    3
4     2               on    2
5     2  to the right of   16
6     3  to the right of   15
7     3  to the right of    8
8     4  to the right of   18
9     5   to the left of    1
10    5   to the left of   17
11    5  to the right of    6
12    6               on   18
13    6   to the left of    5
14    8  to the right of   13
15    8   to the left of    3
16   10  to the right of   11
17   10  to the right of   14
18   11   to the left of   10
19   11   to the left of   14
20   13               on   22
21   13   to the left of    8
22   14  to the right of   11
23   14   to the left of   10
24   15   to the left of    3
25   16   to the left of   18
26   16   to the left of    2
27   17  to the right of    5
28   17  to the right of    1
29   18  to the right of   16
30   18   to the left of    4
31   19  to the right of   21
32   20  to the right of    0
33   20  to the right of   21
34   21   to the left of   19
35   21   to the left of   20