Which kind of animal is in the field?
The animals are zebras.
    src        edge_attr  dst
0     1               in    9
1     1   to the left of    7
2     2  to the right of    8
3     2   to the left of    7
4     2  to the right of    6
5     2  to the right of    4
6     3               of    6
7     3   to the left of    8
8     3   to the left of    4
9     4  to the right of    3
10    4   to the left of    2
11    4   to the left of   11
12    4  to the right of    6
13    4   to the left of   12
14    6  to the right of   13
15    6   to the left of    8
16    6   to the left of    4
17    6   to the left of   15
18    6   to the left of    2
19    7  to the right of    1
20    7  to the right of    2
21    8   to the left of   12
22    8   to the left of    2
23    8  to the right of    3
24    8  to the right of    6
25    8  to the right of   13
26    8   to the left of   11
27   11  to the right of    4
28   11  to the right of    8
29   12  to the right of    8
30   12  to the right of    4
31   13   to the left of    8
32   13   to the left of    6
33   15  to the right of    6