Is there a knife or a plate in this picture?
No, there are no plates or knives.
   src        edge_attr  dst
0    1               in    7
1    1  to the right of    6
2    3   to the left of    4
3    3   to the left of    5
4    4   to the left of    5
5    4               in    7
6    4  to the right of    3
7    5  to the right of    4
8    5  to the right of    3
9    6   to the left of    1