What is covered in snow?
The fire hydrant is covered in snow.
    src        edge_attr  dst
0     0       covered by    4
1     0  to the right of    7
2     1      attached to    7
3     1               of    7
4     3         covering    7
5     4         covering    7
6     4        on top of    7
7     4         covering    0
8     4      surrounding    7
9     5           behind    7
10    7      in front of    5
11    7       covered by    4
12    7    surrounded by    4
13    7       covered by    3
14    7     covered with    4
15    7       covered in    4
16    7   to the left of    0