What is covered in the snow?
The street is covered in snow.
    src        edge_attr  dst
0     2   to the left of    9
1     2   to the left of   10
2     3   to the left of    9
3     4       covered in    0
4     6   to the left of    9
5     8  to the right of   10
6     9  to the right of    2
7     9  to the right of    6
8     9  to the right of    3
9    10   to the left of    8
10   10  to the right of    2
11   10   on the side of    9