What is the color of the sheets on the left?
The sheets are brown.
    src        edge_attr  dst
0     0   to the left of   15
1     0  to the right of    9
2     0   to the left of   17
3     0   to the left of   12
4     1            below   18
..  ...              ...  ...
82   18            above    1
83   18  to the right of    9
84   18   to the left of    5
85   18   to the left of   12
86   18  to the right of   10

[87 rows x 3 columns]