What shape is that tennis racket?
The tennis racket is square.
   src        edge_attr  dst
0    0  to the right of    8
1    0  to the right of    3
2    3   to the left of    0
3    3  to the right of    8
4    8   to the left of    0
5    8   to the left of   11
6    8   to the left of    3
7   11  to the right of    8
8   13               of   11