What is the animal that pulls the boy?
The animal is a dog.
   src        edge_attr  dst
0    0   to the left of    4
1    2               of    6
2    4  to the right of    0
3    5        pulled by   11
4    5               on    4
5    5  to the right of    9
6    8            above    7
7    9   to the left of    5
8   11          pulling    5