What is the watercraft that is to the right of the cars that are on the hills?
The watercraft is a sailboat.
    src        edge_attr  dst
0     1  to the right of   10
1     1         covering   10
2     1  to the right of    9
3     1  to the right of    5
4     3  to the right of    5
5     3  to the right of    8
6     3  to the right of    6
7     4             with   14
8     4               in   13
9     5   to the left of    3
10    5   to the left of    1
11    5   to the left of    8
12    5   to the left of    6
13    5  to the right of   10
14    6               on   13
15    6   to the left of    3
16    6   to the left of    7
17    6  to the right of    5
18    6  to the right of   10
19    6  to the right of    9
20    7  to the right of    6
21    7  to the right of    8
22    8   to the left of    3
23    8  to the right of    5
24    8   to the left of    7
25    8  to the right of    9
26    8  to the right of   10
27    9   to the left of    1
28    9   to the left of    6
29    9               on   10
30    9   to the left of    8
31    9  to the right of   10
32   10       covered by    1
33   10   to the left of    1
34   10   to the left of    9
35   10   to the left of    8
36   10   to the left of    6
37   10   to the left of    5
38   11  to the right of   12
39   12   to the left of   11
40   14               in    4