What is located on top of the tennis racket?
The soccer ball is on top of the tennis racket.
   src        edge_attr  dst
0    3  to the right of    5
1    3        on top of    9
2    4   to the left of    7
3    4   to the left of    8
4    5   to the left of    3
5    7  to the right of    4
6    8  to the right of    4