How do the green trees look like, bare or lush?
The trees are lush.
   src        edge_attr  dst
0    1  to the right of    3
1    2            below    4
2    2  to the right of    6
3    2  to the right of    3
4    3   to the left of    1
5    3   to the left of    2
6    6   to the left of    2