Which kind of animal is gray?
The animal is an elephant.
     src        edge_attr  dst
0      0  to the right of   22
1      1   to the left of   15
2      1   to the left of   23
3      1   to the left of   37
4      1   to the left of   31
..   ...              ...  ...
313   37   to the left of   26
314   37   to the left of    9
315   37   to the left of   31
316   37   to the left of    5
317   37  to the right of   10

[318 rows x 3 columns]