What color is that gate?
The gate is blue.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    4
2     0  to the right of   20
3     1  to the right of    5
4     1  to the right of   20
..  ...              ...  ...
77   20  to the right of    6
78   20   to the left of    1
79   20   to the left of    0
80   21   to the left of    9
81   21   to the left of   18

[82 rows x 3 columns]