Is there a zebra in the picture?
No, there are no zebras.
    src        edge_attr  dst
0     0               by    2
1     1               by    3
2     1   to the left of    3
3     1               by    4
4     1             near    4
5     2               in    4
6     2               by    3
7     2               on    4
8     3               by    1
9     3               in    4
10    3             near    5
11    3               on    4
12    3               by    4
13    3               by    2
14    3  to the right of    1
15    4               by    1
16    4             near    1
17    4               by    2
18    4               by    3
19    5               by    1
20    5             near    3