What touches the grass?
The trunk touches the grass.
    src        edge_attr  dst
0     0  to the right of    2
1     0   to the left of    6
2     0   to the left of    8
3     0  to the right of   17
4     0  to the right of   13
..  ...              ...  ...
68   17   to the left of   12
69   17   to the left of   11
70   17   to the left of    9
71   17       grazing on   10
72   17      standing on   10

[73 rows x 3 columns]