What does the smoke cover?
The smoke covers the street.
     src        edge_attr  dst
0      0           behind    1
1      0   to the left of    5
2      0   to the left of    8
3      0           behind    2
4      0   to the left of   11
..   ...              ...  ...
179   35   to the left of   36
180   35               on   34
181   36               on   34
182   36  to the right of   35
183   36  to the right of   24

[184 rows x 3 columns]