Which color is the grass, brown or green?
The grass is brown.
   src        edge_attr  dst
0    4   to the left of   10
1    5  to the right of   10
2    5  to the right of    6
3    5  to the right of   11
4    6   to the left of    5
5    8               of   10
6   10  to the right of    4
7   10   to the left of    5
8   11   to the left of    5