Is the ground rocky?
No, the ground is snowy.
    src        edge_attr  dst
0     0  to the right of   11
1     1  to the right of   11
2     2               on   11
3     3   to the left of    4
4     3   to the left of   10
5     3   to the left of   12
6     4  to the right of    3
7     5      in front of    9
8     7               in    2
9     7  to the right of   11
10    9           behind    5
11   10  to the right of   11
12   10  to the right of    3
13   11   to the left of   10
14   11   to the left of    7
15   11   to the left of    1
16   11   to the left of    0
17   12  to the right of    3