Who is on the boat in the water?
The police officer is on the boat.
    src        edge_attr  dst
0     0   to the left of    8
1     0               on    4
2     0          driving    4
3     0      standing on    4
4     0          wearing    1
5     1   to the left of    2
6     1   to the left of    8
7     1   to the left of    3
8     2               on    4
9     2   to the left of    3
10    2  to the right of    1
11    3  to the right of    2
12    3  to the right of    1
13    3   to the left of    7
14    4               in    9
15    4               in   10
16    5   to the left of    8
17    6   to the left of    8
18    6   to the left of   12
19    6   on the side of    4
20    7  to the right of    3
21    7               on    3
22    8  to the right of   12
23    8  to the right of    0
24    8  to the right of    1
25    8  to the right of    5
26    8  to the right of    6
27   12   to the left of    8
28   12  to the right of    6