What is covered by the dirt?
The ground is covered by the dirt.
     src        edge_attr  dst
0      0  to the right of   26
1      0  to the right of   25
2      0   to the left of   30
3      0   to the left of    3
4      0   to the left of    2
..   ...              ...  ...
140   30   to the left of    3
141   30   to the left of   24
142   30  to the right of   26
143   30   to the left of   22
144   30  to the right of   27

[145 rows x 3 columns]