Where is the couple?
The couple is on the beach.
    src        edge_attr  dst
0     0               on    1
1     0               on    9
2     0  to the right of   16
3     0   to the left of   12
4     0  to the right of   21
..  ...              ...  ...
69   21   to the left of   19
70   21  to the right of   20
71   21   to the left of   16
72   21   to the left of    0
73   21  to the right of    3

[74 rows x 3 columns]