Which size is the animal of the grass, small or large?
The dog is small.
   src        edge_attr  dst
0    0   to the left of    2
1    1               of    3
2    2  to the right of    0
3    3  to the right of    6
4    6     playing with    1
5    6         touching    1
6    6   to the left of    3
7    6               of    3