What animals are black?
The animals are lambs.
    src        edge_attr  dst
0     0   to the left of    5
1     2               on    9
2     2   to the left of    5
3     3  to the right of    9
4     4   to the left of    5
5     5  to the right of    2
6     5  to the right of    0
7     5  to the right of    4
8     8               on    7
9     8  to the right of   11
10    9   to the left of    3
11   11    drinking from    5
12   11   to the left of    8