The man is riding on what?
The man is riding on the snowboard.
    src        edge_attr  dst
0     0          wearing    6
1     0        on top of   13
2     0        riding on   13
3     0          wearing    7
4     0             near   16
5     0            using   13
6     0          wearing    1
7     0      standing on   13
8     0          wearing   17
9     0          wearing   15
10    2  to the right of   14
11    2   to the left of    9
12    3   to the left of   18
13    3   to the left of    9
14    3   to the left of    5
15    5  to the right of    3
16    5  to the right of   19
17    5  to the right of   17
18    5   to the left of    9
19    5  to the right of    6
20    5  to the right of   14
21    5  to the right of   12
22    6  to the right of   16
23    6   to the left of    5
24    9  to the right of   18
25    9  to the right of   19
26    9  to the right of    3
27    9  to the right of    2
28    9  to the right of   11
29    9  to the right of    5
30    9  to the right of   17
31    9  to the right of   12
32   10  to the right of   16
33   11   to the left of    9
34   11   to the left of   18
35   12   to the left of    5
36   12   to the left of    9
37   12   to the left of   18
38   14   to the left of    2
39   14   to the left of    5
40   14   to the left of   17
41   14  to the right of   16
42   16   to the left of   10
43   16   to the left of    6
44   16             near    0
45   16   to the left of   14
46   17   to the left of   18
47   17  to the right of   14
48   17   to the left of    9
49   17   to the left of    5
50   18  to the right of   12
51   18  to the right of   17
52   18  to the right of    3
53   18  to the right of   11
54   18  to the right of   19
55   18   to the left of    9
56   19   to the left of    9
57   19   to the left of   18
58   19   to the left of    5