What does the man ride on?
The man rides on the skis.
    src        edge_attr  dst
0     1          wearing    3
1     1          wearing   10
2     1          wearing    9
3     1        riding on    0
4     1          wearing   11
5     1          wearing   12
6     2  to the right of    9
7     4          wearing    5
8     4   to the left of    7
9     4   to the left of    6
10    5   to the left of    7
11    5   to the left of    6
12    6          wearing    7
13    6  to the right of    4
14    6  to the right of    5
15    7  to the right of    5
16    7  to the right of    4
17    9   to the left of    2