Where is the grass?
The grass is on the mountain.
    src        edge_attr  dst
0     0  to the right of   14
1     0               on    5
2     0  to the right of   12
3     0  to the right of    2
4     1               on    5
5     2               on   15
6     2   to the left of    0
7     2   to the left of    5
8     3   to the left of    5
9     3               in    4
10    5  to the right of    3
11    5  to the right of    2
12    5  to the right of   12
13    5  to the right of    8
14    5  to the right of   14
15    8   to the left of    5
16    9               on   15
17   12   to the left of    5
18   12   to the left of    0
19   13               on    5
20   14   to the left of    0
21   14   to the left of    5