Where is the boat?
The boat is on the beach.
    src        edge_attr  dst
0     0   to the left of    2
1     1               on    2
2     1  to the right of    3
3     2  to the right of    0
4     3   to the left of    1
5     3   to the left of    6
6     3   to the left of    5
7     4               in    3
8     5               on    2
9     5   to the left of    6
10    5  to the right of    3
11    6  to the right of    5
12    6               on    2
13    6  to the right of    3
14    7               on    2
15    7               in    0