Is there any knife on the napkin on the left side?
Yes, there is a knife on the napkin.
    src        edge_attr  dst
0     0   to the left of   23
1     0   to the left of   14
2     0   to the left of    7
3     0   to the left of    1
4     0   to the left of    9
..  ...              ...  ...
90   25  to the right of   10
91   26  to the right of    5
92   26   to the left of    3
93   26   to the left of   22
94   26   to the left of   20

[95 rows x 3 columns]