What does the dog look at?
The dog looks at the ocean.
    src        edge_attr  dst
0     0               in    3
1     0   to the left of   19
2     0   to the left of    5
3     0   to the left of   18
4     0  to the right of   14
..  ...              ...  ...
67   20               in   19
68   20   to the left of   22
69   20   to the left of   16
70   22  to the right of    3
71   22  to the right of   20

[72 rows x 3 columns]