What color is the trash bin made of metal?
The garbage bin is gray.
   src        edge_attr  dst
0    0  to the right of    2
1    2               on    0
2    2   to the left of    0
3    2   to the left of    3
4    3  to the right of    4
5    3  to the right of    2
6    4   to the left of    3