Is the dog to the right or to the left of the pillow on the right side?
The dog is to the left of the pillow.
   src        edge_attr  dst
0    0  to the right of    3
1    0  to the right of    4
2    0  to the right of    2
3    2   to the left of    0
4    3   to the left of    0
5    3  to the right of    4
6    4   to the left of    0
7    4   to the left of    3