Is there a red flag in the image?
Yes, there is a red flag.
    src        edge_attr  dst
0     0  to the right of   10
1     0   to the left of    1
2     0               on   11
3     0  to the right of   28
4     1  to the right of   28
..  ...              ...  ...
87   28  to the right of    6
88   28   to the left of   10
89   30   to the left of    2
90   30   to the left of    8
91   30  to the right of    9

[92 rows x 3 columns]