What animal is black?
The animal is a cow.
    src        edge_attr  dst
0     1           behind    2
1     2      in front of    1
2     2        eating in    6
3     2  to the right of    4
4     2               in    6
5     2  to the right of    5
6     2               on    6
7     2  to the right of   12
8     2  to the right of   10
9     4               of    5
10    4   to the left of    2
11    5        eating in    6
12    5   to the left of    8
13    5   to the left of    2
14    8  to the right of    5
15   10   to the left of    2
16   11  to the right of   13
17   11  to the right of   14
18   12   to the left of    2
19   13   to the left of   11
20   14               on   13
21   14   to the left of   11