Do you see any cows or zebras?
No, there are no cows or zebras.
    src        edge_attr  dst
0     1  to the right of   13
1     1  to the right of    4
2     2             near    3
3     3      in front of    4
4     3           behind    4
5     3      in front of    9
6     3   on the side of    2
7     3             near    2
8     4       walking on    2
9     4   to the left of    9
10    4   to the left of   13
11    4   to the left of    1
12    4   to the left of   12
13    5   to the left of   19
14    5   to the left of   15
15    5   to the left of   10
16    6  to the right of   14
17    8           behind    9
18    9       walking on    2
19    9           behind    3
20    9      in front of    8
21    9  to the right of    4
22   10   to the left of   19
23   10   to the left of   15
24   10  to the right of    5
25   12  to the right of    4
26   13  to the right of    4
27   13   to the left of    1
28   14   to the left of    6
29   15  to the right of   10
30   15  to the right of    5
31   15   to the left of   19
32   17  to the right of   18
33   18   to the left of   20
34   18   to the left of   17
35   19  to the right of    5
36   19  to the right of   15
37   19  to the right of   10
38   20  to the right of   18