What kind of watercraft is tied to the wall?
The watercraft is boats.
    src        edge_attr  dst
0     0             near   14
1     0  to the right of    9
2     0  to the right of    7
3     1               on   13
4     2  to the right of   12
5     2  to the right of    9
6     3   to the left of    5
7     4             near   14
8     5               on   13
9     5               in   13
10    5  to the right of    3
11    5  to the right of    6
12    6   to the left of    5
13    7  to the right of   10
14    7          tied to    8
15    7               on   14
16    7               in   14
17    7   to the left of   13
18    7   to the left of    0
19    9               in   14
20    9   to the left of   12
21    9   to the left of    0
22    9   to the left of    2
23    9   to the left of   13
24   10   to the left of    7
25   11             with    3
26   12   to the left of   13
27   12   to the left of    2
28   12  to the right of    9
29   13  to the right of    7
30   13  to the right of   12
31   13  to the right of    9
32   14             near    4
33   14             near    0