Is the plate to the left or to the right of the fork?
The plate is to the left of the fork.
   src        edge_attr  dst
0    2  to the right of    8
1    2  to the right of    3
2    3   to the left of    2
3    4   to the left of    5
4    5  to the right of    4
5    8             with    3
6    8   to the left of    2