What is the watercraft on the lake in the picture?
The watercraft is boats.
    src        edge_attr  dst
0     0               on    3
1     0   to the left of    8
2     1  to the right of    8
3     4  to the right of    7
4     4               on    5
5     4      in front of    6
6     6   to the left of    7
7     6           behind    4
8     7   to the left of    4
9     7  to the right of    6
10    8               in    5
11    8  to the right of    0
12    8   to the left of    1