How long is the beak that is gray?
The beak is long.
   src        edge_attr  dst
0    0               of    2
1    3               of    2
2    3  to the right of    7
3    3           behind    7
4    5               of    2
5    6               of    2
6    6  to the right of    7
7    7   to the left of    3
8    7               of    2
9    7   to the left of    6