Who is on top of the skateboard?
The boy is on top of the skateboard.
    src        edge_attr  dst
0     0   to the left of    3
1     0               of    1
2     1          wearing    5
3     1          wearing    7
4     1      in front of   19
5     1          wearing    8
6     1      in front of   16
7     1          wearing   14
8     1        on top of   13
9     1          wearing    4
10    2  to the right of   20
11    2  to the right of   13
12    3               of   13
13    3  to the right of    0
14    5               of    1
15    6   to the left of   10
16    6               of   16
17    7  to the right of   19
18    7  to the right of    8
19    7          worn on   18
20    7               of    1
21    8               of    1
22    8   to the left of   11
23    8   to the left of   12
24    8   to the left of    7
25    8   to the left of   18
26   10   to the left of   18
27   10   to the left of   12
28   10  to the right of    6
29   11               of    1
30   11  to the right of    8
31   11  to the right of   19
32   12  to the right of   19
33   12  to the right of   10
34   12               of    1
35   12  to the right of    8
36   13   to the left of   20
37   13   to the left of    2
38   13  to the right of   14
39   14               of    1
40   14   to the left of   13
41   15               of   13
42   16           behind    1
43   18               of    1
44   18  to the right of   10
45   18  to the right of    8
46   18  to the right of   19
47   19           behind    1
48   19   to the left of   12
49   19   to the left of   11
50   19               on   16
51   19   to the left of    7
52   19   to the left of   18
53   20  to the right of   13
54   20   to the left of    2