What kind of watercraft is the island behind of?
The island is behind the boat.
    src        edge_attr  dst
0     0             near    1
1     1             near    0
2     2   to the left of    7
3     2   to the left of    6
4     2  to the right of    3
5     3   to the left of    2
6     3   to the left of    6
7     4           behind    6
8     4           behind    9
9     6      floating on    8
10    6  to the right of    9
11    6      in front of    4
12    6               on    8
13    6  to the right of    3
14    6  to the right of    2
15    6             near    9
16    6               in    8
17    7  to the right of    9
18    7  to the right of    2
19    8            below    5
20    9   to the left of    7
21    9   to the left of    6
22    9      floating on    8
23    9      in front of    4
24    9               on    8
25    9               in    8
26    9            below    5
27    9          next to    6