Is there an ostrich or a lamb?
No, there are no lambs or ostriches.
     src       edge_attr  dst
0      1  to the left of   10
1      1  to the left of   12
2      1  to the left of   29
3      1  to the left of   16
4      1  to the left of   13
..   ...             ...  ...
200   30  to the left of    5
201   30  to the left of   18
202   30  to the left of   12
203   30  to the left of   23
204   30  to the left of   20

[205 rows x 3 columns]