Do you see both a knife and a plate?
No, there is a plate but no knives.
     src        edge_attr  dst
0      0  to the right of   15
1      0   to the left of   25
2      0  to the right of   21
3      0   to the left of    8
4      0  to the right of   11
..   ...              ...  ...
126   25   to the left of    7
127   25  to the right of   17
128   25  to the right of   14
129   25  to the right of   20
130   25  to the right of   19

[131 rows x 3 columns]