What is lying on the ground?
The logs are lying on the ground.
    src        edge_attr  dst
0     0   to the left of   19
1     0   to the left of   21
2     0   to the left of   14
3     1  to the right of   19
4     1   to the left of    9
..  ...              ...  ...
57   22  to the right of   15
58   22  to the right of    8
59   22  to the right of   17
60   22   to the left of   23
61   23  to the right of   22

[62 rows x 3 columns]