What is covered by the snow?
The ground is covered by the snow.
    src        edge_attr  dst
0     0   to the left of   14
1     0   to the left of   21
2     2         covering   16
3     3  to the right of   24
4     3  to the right of   19
..  ...              ...  ...
89   28   to the left of   12
90   28   to the left of   20
91   28   to the left of   21
92   28   to the left of   22
93   28   to the left of   11

[94 rows x 3 columns]