Do the leaves of the trees look red?
Yes, the leaves are red.
   src        edge_attr  dst
0    0               in    2
1    3               in    2
2    4  to the right of    6
3    5  to the right of    6
4    6   to the left of    5
5    6               in    2
6    6   to the left of    4
7    7               in    2
8    7           eating    0
9    8               in    2