Who is in the snow?
The people are in the snow.
   src        edge_attr  dst
0    1               on    4
1    1               in    4
2    1   to the left of    2
3    2               on    4
4    2  to the right of    1
5    2               in    4
6    2   to the left of    3
7    3               in    4
8    3               on    4
9    3  to the right of    2