What is the man on?
The man is on the surfboard.
    src        edge_attr  dst
0     0        riding on    6
1     0               in   11
2     0          wearing    7
3     0            above    6
4     0          holding    6
5     0               on    6
6     1  to the right of    4
7     1  to the right of    3
8     1  to the right of   10
9     2  to the right of    4
10    3  to the right of    4
11    3   to the left of    1
12    4   to the left of   10
13    4   to the left of    2
14    4   to the left of   12
15    4   to the left of    5
16    4   to the left of    3
17    4   to the left of    1
18    5  to the right of    4
19    6               in   11
20   10  to the right of    4
21   10   to the left of    1
22   12  to the right of    4