Are there any knives?
No, there are no knives.
    src        edge_attr  dst
0     0  to the right of    4
1     0   to the left of    1
2     0   to the left of    5
3     1  to the right of    0
4     1  to the right of    4
..  ...              ...  ...
72   21  to the right of    3
73   22   to the left of    2
74   22  to the right of    8
75   22   to the left of   18
76   24  to the right of    3

[77 rows x 3 columns]