What is the watercraft behind the man that is walking in the ocean?
The watercraft is a sailboat.
   src        edge_attr  dst
0    0               on    5
1    2  to the right of    8
2    3          holding    5
3    3               in    6
4    3       walking in    6
5    3      in front of    7
6    7               in    6
7    7               on    6
8    7           behind    3
9    8   to the left of    2