Is the cake on the plate?
Yes, the cake is on the plate.
   src        edge_attr  dst
0    0               on    2
1    1  to the right of    5
2    3  to the right of    5
3    4   to the left of    5
4    5  to the right of    4
5    5   to the left of    3
6    5   to the left of    1