Are there both knives and plates in this picture?
Yes, there are both a knife and plates.
     src        edge_attr  dst
0      0   to the left of   35
1      0   to the left of   20
2      1   to the left of   20
3      1   to the left of   35
4      2  to the right of   16
..   ...              ...  ...
163   39   to the left of   22
164   39   to the left of    6
165   39   to the left of   32
166   39   to the left of   12
167   39   to the left of   15

[168 rows x 3 columns]