Is there a cow to the left of the trailer?
Yes, there is a cow to the left of the trailer.
     src        edge_attr  dst
0      0   to the left of   17
1      0  to the right of   15
2      0   to the left of   22
3      0  to the right of   21
4      0   to the left of    3
..   ...              ...  ...
104   22   to the left of    5
105   24  to the right of   12
106   25  to the right of   15
107   25  to the right of   21
108   25   to the left of    5

[109 rows x 3 columns]