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