What is on the white dog?
The hat is on the dog.
   src        edge_attr  dst
0    3               of    9
1    4               on    9
2    4   to the left of    7
3    4               on    8
4    7  to the right of   15
5    7  to the right of    4
6    8               of    9
7    9          wearing    4
8   15   to the left of    7