What is the dog in front of?
The dog is in front of the window.
   src        edge_attr  dst
0    0  to the right of    1
1    1               of    5
2    1   to the left of    6
3    1   to the left of    0
4    3               of    5
5    4           behind    5
6    5      in front of    4
7    6               of    5
8    6  to the right of    1
9    8               of    5