What type of watercraft is in the blue water?
The watercraft is a ship.
    src        edge_attr  dst
0     0           behind   10
1     0      in front of    1
2     2               on   10
3     4  to the right of    5
4     5           behind   10
5     5   to the left of   10
6     5   to the left of    4
7     6  to the right of   12
8    10      in front of    5
9    10               in   14
10   10      in front of    0
11   10               on   14
12   10  to the right of   11
13   10  to the right of    5
14   11   to the left of   12
15   11   to the left of   10
16   11               in   14
17   12  to the right of   11
18   12   to the left of    6
19   12               on   10
20   13               on   10