Is the sandwich to the right or to the left of the cup?
The sandwich is to the right of the cup.
   src        edge_attr  dst
0    0               on    5
1    1   to the left of    3
2    2   to the left of    3
3    3  to the right of    1
4    3  to the right of    2
5    5               on    4
6    6               on    7