What is the color of the skateboard?
The skateboard is blue.
    src        edge_attr  dst
0     4   to the left of    6
1     4   to the left of   11
2     5               on    1
3     5      in front of   11
4     5          wearing   13
5     5      in front of    7
6     5      in front of   10
7     5          wearing    3
8     5          wearing    4
9     5   to the left of    6
10    5          wearing    2
11    5          wearing   12
12    5  to the right of   16
13    6  to the right of   11
14    6  to the right of    5
15    6  to the right of    4
16    6  to the right of   10
17    7           behind    5
18    9  to the right of   16
19   10           behind    5
20   10      parked near    1
21   10   to the left of   11
22   10        parked on    9
23   10   to the left of    6
24   11   to the left of    6
25   11           behind    5
26   11  to the right of   10
27   11  to the right of    4
28   13   to the left of   15
29   15  to the right of   13
30   16   to the left of    9
31   16   to the left of    5