Do you see either a knife or an onion in this photo?
Yes, there is an onion.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of    1
2     0   to the left of    9
3     1  to the right of    3
4     1   to the left of    4
..  ...              ...  ...
83   20   to the left of    8
84   21   to the left of   16
85   21               of    2
86   21   to the left of   15
87   21   to the left of    7

[88 rows x 3 columns]