What color does the signal light on the left have?
The traffic light has green color.
    src        edge_attr  dst
0     0   to the left of   16
1     0   to the left of    1
2     0   to the left of   19
3     0   to the left of    2
4     0  to the right of   15
5     0  to the right of   12
6     1  to the right of    0
7     1   to the left of   14
8     1   to the left of   11
9     2   to the left of   11
10    2  to the right of    0
11    2  to the right of   16
12    2   to the left of   14
13    4               on    3
14    5   to the left of    8
15    7   to the left of    8
16    8  to the right of    7
17    8  to the right of    5
18    9   to the left of   13
19   11  to the right of   16
20   11  to the right of    1
21   11  to the right of    2
22   11  to the right of   17
23   11  to the right of   19
24   12   to the left of    0
25   13  to the right of    9
26   13   to the left of   20
27   14  to the right of    1
28   14  to the right of    2
29   14   to the left of   18
30   14  to the right of   19
31   14  to the right of   17
32   15   to the left of    0
33   15   to the left of   19
34   16   to the left of    2
35   16  to the right of    0
36   16   to the left of   11
37   17   to the left of   11
38   17   to the left of   14
39   18  to the right of   14
40   19   to the left of   11
41   19  to the right of    0
42   19  to the right of   15
43   19   to the left of   14
44   20  to the right of   13