What is the large bird surrounded by?
The bird is surrounded by the sky.
   src        edge_attr  dst
0    0               in    1
1    0    surrounded by    1
2    3   to the left of    4
3    3   to the left of    5
4    4  to the right of    3
5    4  to the right of    5
6    5   to the left of    4
7    5  to the right of    3
8    5               of    0