Are there any ships in the ocean?
No, there is a bus in the ocean.
    src        edge_attr  dst
0     0   to the left of    4
1     2  to the right of    9
2     2  to the right of    5
3     2  to the right of   12
4     2   to the left of    8
5     3   to the left of    7
6     3   to the left of   13
7     3   to the left of   10
8     4  on the front of   14
9     4  to the right of    0
10    5   to the left of    2
11    6  to the right of    7
12    6  to the right of   13
13    7  to the right of    3
14    7  to the right of   10
15    7   to the left of    6
16    7   to the left of   13
17    8  to the right of    2
18    9   to the left of    2
19    9  to the right of   12
20   10   to the left of    7
21   10           inside   14
22   10  to the right of    3
23   10               on   14
24   10   to the left of   13
25   11   to the left of   12
26   12  to the right of   11
27   12   to the left of    2
28   12   to the left of    9
29   13   to the left of    6
30   13  to the right of   10
31   13  to the right of    3
32   13  to the right of    7
33   14               in   15