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