What color does the traffic light on the left side have?
The traffic light has black color.
    src        edge_attr  dst
0     0  to the right of    3
1     0   to the left of    1
2     0  to the right of    9
3     0  to the right of    4
4     1          next to    7
5     1             near    7
6     1  to the right of    3
7     1  to the right of    0
8     1  to the right of    4
9     1  to the right of    7
10    3   to the left of    7
11    3   to the left of    1
12    3   to the left of    0
13    4   to the left of    1
14    4   to the left of    0
15    4               on    9
16    4   to the left of    7
17    5   to the left of    6
18    6   to the left of    7
19    6  to the right of    5
20    6               on    7
21    7             near    1
22    7   to the left of    1
23    7  to the right of    3
24    7  to the right of    4
25    7  to the right of    6
26    7  to the right of    8
27    7  to the right of    9
28    7  to the right of   11
29    8   to the left of    7
30    9   to the left of    0
31    9               on    7
32    9   to the left of    7
33   11   to the left of    7
34   11               on    6