Are the animals of different types?
No, all the animals are giraffes.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of    5
2     1  to the right of    4
3     3   to the left of    5
4     3   to the left of    7
5     4   to the left of    1
6     5  to the right of    6
7     5  to the right of    3
8     5  to the right of   11
9     5  to the right of   10
10    5  to the right of    0
11    6   to the left of    7
12    6   to the left of    5
13    6   to the left of   10
14    7  to the right of    6
15    7  to the right of    3
16    7  to the right of    0
17    7  to the right of   10
18    7  to the right of   11
19   10   to the left of    5
20   10  to the right of    6
21   10   to the left of    7
22   11   to the left of    5
23   11   to the left of    7