What kind of watercraft is in the sea?
The watercraft is boats.
    src        edge_attr  dst
0     0  to the right of   11
1     0  to the right of    6
2     1               in    2
3     2   to the left of   13
4     2  to the right of    5
5     5   to the left of    8
6     5   to the left of   13
7     5   to the left of    2
8     6   to the left of    0
9     6   to the left of   12
10    8  to the right of    5
11    8  to the right of   12
12    8   to the left of   13
13    8               in    2
14    9               in    2
15    9   to the left of   13
16   11   to the left of    0
17   12   to the left of    8
18   12   to the left of   13
19   12  to the right of    6
20   13  to the right of    9
21   13  to the right of    2
22   13  to the right of    5
23   13  to the right of   12
24   13  to the right of    8