Are there any boats?
No, there are no boats.
    src        edge_attr  dst
0     0               on    4
1     1               by    3
2     1   to the left of    6
3     3   to the left of    5
4     3   to the left of   10
5     5               on    3
6     5  to the right of    3
7     5  to the right of    6
8     5               in    3
9     5  to the right of    7
10    6  to the right of    8
11    6   to the left of    5
12    6  to the right of    1
13    7   to the left of   10
14    7               in    2
15    7   to the left of    5
16    8   to the left of    6
17   10  to the right of    7
18   10  to the right of    3