How big is the black box?
The box is small.
    src        edge_attr  dst
0     0   to the left of   13
1     0   to the left of   15
2     0   to the left of    7
3     0   to the left of    4
4     0   to the left of    2
..  ...              ...  ...
77   16   to the left of    9
78   16  to the right of   12
79   16   to the left of    5
80   16   to the left of   11
81   16               on    7

[82 rows x 3 columns]