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