On which side of the picture is the traffic signal?
The traffic signal is on the left of the image.
    src        edge_attr  dst
0     2   to the left of    9
1     3   to the left of   18
2     3   to the left of   16
3     3   to the left of    9
4     4   to the left of   16
5     4          wearing    3
6     4   to the left of    9
7     4   to the left of   18
8     5   to the left of   11
9     6  to the right of   15
10    6  to the right of   17
11    6  to the right of   11
12    6  to the right of    8
13    8  to the right of   11
14    8  to the right of   15
15    8   to the left of    6
16    9  to the right of   18
17    9  to the right of    2
18    9  to the right of   14
19    9  to the right of   12
20    9  to the right of    4
21    9  to the right of    3
22   10   to the left of   15
23   11  to the right of    5
24   11   to the left of    6
25   11   to the left of    8
26   11   to the left of   17
27   12   to the left of   18
28   12   to the left of    9
29   13   to the left of   16
30   14   to the left of   16
31   14   to the left of   18
32   14   to the left of    9
33   15   to the left of    8
34   15   to the left of   17
35   15   to the left of    6
36   15  to the right of   10
37   16  to the right of   14
38   16  to the right of    3
39   16  to the right of   13
40   16  to the right of    4
41   17  to the right of   15
42   17   to the left of    6
43   17  to the right of   11
44   18  to the right of   14
45   18  to the right of   12
46   18  to the right of    3
47   18  to the right of    4
48   18   to the left of    9