Are these animals of different types?
Yes, they are zebras and birds.
    src        edge_attr  dst
0     0        on top of   14
1     0   to the left of    7
2     1               on   14
3     1             near    7
4     6  to the right of   10
5     6   to the left of   17
6     6               of    9
7     7  to the right of    0
8     7             near    1
9     8         lying on   14
10   10   to the left of    6
11   10   to the left of   17
12   10   to the left of   16
13   11  to the right of   17
14   13       perched on   14
15   16  to the right of   10
16   16   to the left of   17
17   17  to the right of    6
18   17  to the right of   10
19   17   to the left of   11
20   17  to the right of   16