What type of animal is not brown, the goose or the duck?
The goose is not brown.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of    8
2     2   to the left of    4
3     2   to the left of    7
4     2   to the left of    6
5     2   to the left of    8
6     3               by    2
7     3   to the left of   10
8     4               of    6
9     4  to the right of    2
10    4  to the right of    0
11    6  to the right of    2
12    7  to the right of    2
13    7               of    6
14    8  to the right of    2
15    8  to the right of   11
16    8  to the right of    0
17   10  to the right of    3
18   11   to the left of    8