Is there a white zebra or lamb?
No, there is a lamb but it is green.
    src        edge_attr  dst
0     0  to the right of   13
1     2               in    3
2     2               on    3
3     4  to the right of    5
4     5   to the left of    4
5     5   to the left of   10
6     6   to the left of    8
7     6   to the left of    9
8     7   to the left of    9
9     7   to the left of    8
10    8  to the right of    6
11    8  to the right of    9
12    8  to the right of    7
13    9  to the right of    7
14    9  to the right of    6
15    9   to the left of    8
16   10  to the right of   13
17   10  to the right of   11
18   10  to the right of    5
19   11   to the left of   10
20   11  to the right of   13
21   13   to the left of    0
22   13   to the left of   10
23   13   to the left of   11