Are there either white zebras or horses?
Yes, there is a white horse.
     src        edge_attr  dst
0      1  to the right of   24
1      1   to the left of   13
2      1  to the right of   17
3      1   to the left of    6
4      1  to the right of    3
..   ...              ...  ...
233   30  to the right of   27
234   30  to the right of   28
235   30  to the right of    1
236   30  to the right of   24
237   30  to the right of   18

[238 rows x 3 columns]