Are there benches?
Yes, there is a bench.
    src        edge_attr  dst
0     0  to the right of    2
1     0  to the right of   20
2     1   to the left of   21
3     2   to the left of    0
4     3   to the left of   21
..  ...              ...  ...
70   21  to the right of    9
71   21  to the right of   16
72   21  to the right of   15
73   21  to the right of    1
74   21  to the right of    3

[75 rows x 3 columns]