What is the bird on, a pig or a sheep?
The bird is on a sheep.
    src        edge_attr  dst
0     0  to the right of    6
1     0  to the right of    7
2     1   to the left of    5
3     2   to the left of    6
4     3   to the left of    7
5     3               on    6
6     5  to the right of    1
7     6   to the left of    0
8     6  to the right of    2
9     6               of    6
10    7               of    6
11    7   to the left of    0
12    7  to the right of    3