Are there either bears or elephants?
Yes, there is an elephant.
     src        edge_attr  dst
0      0  to the right of   23
1      0  to the right of    8
2      0  to the right of    5
3      0  to the right of   14
4      0   to the left of   10
..   ...              ...  ...
153   27  to the right of   26
154   27  to the right of    8
155   27  to the right of   14
156   28   to the left of   11
157   28   to the left of   10

[158 rows x 3 columns]