Who holds the surfboard?
The surfer holds the surfboard.
    src        edge_attr  dst
0     0   to the left of    5
1     1           behind    4
2     2   to the left of    9
3     3      standing on    4
4     3          holding    9
5     3       walking on    4
6     3         carrying    9
7     3          wearing    8
8     5  to the right of    0
9     7               in    6
10    9  to the right of    2