How's the weather?
It is foggy.
   src        edge_attr  dst
0    1  to the right of    6
1    3      in front of    7
2    6   to the left of    1
3    6   to the left of   13
4    7           behind    3
5   11   to the left of   18
6   13  to the right of    6
7   16   to the left of   18
8   18  to the right of   11
9   18  to the right of   16