Do you see any tables or couches that are not green?
No, there is a table but it is green.
   src        edge_attr  dst
0    3  to the right of   11
1    4   to the left of    8
2    6   to the left of    8
3    8  to the right of    4
4    8  to the right of    6
5   11   to the left of    3