Are there any birds?
Yes, there is a bird.
    src        edge_attr  dst
0     0   to the left of    8
1     0   to the left of    4
2     0   to the left of    5
3     2   to the left of    9
4     3   to the left of    7
5     4  to the right of    0
6     5  to the right of    0
7     5  to the right of    9
8     7  to the right of    3
9     7               of    4
10    8  to the right of    0
11    9   to the left of    5
12    9  to the right of    2