How clean is the sheet made of lace?
The bed sheet is dirty.
   src        edge_attr  dst
0    0            above    1
1    1            under    0
2    1  to the right of    5
3    1  to the right of    4
4    2  to the right of    6
5    4   to the left of    1
6    5   to the left of    1
7    6   to the left of    2