What is the color of the curtain the chair is to the left of?
The curtain is green.
    src        edge_attr  dst
0     0   to the left of    1
1     1  to the right of    7
2     1  to the right of    0
3     1  to the right of    8
4     1  to the right of    4
5     1  to the right of    6
6     4   to the left of    6
7     4   to the left of    1
8     5               on    5
9     6  to the right of    8
10    6  to the right of    4
11    6   to the left of    1
12    6  to the right of    7
13    7   to the left of    6
14    7   to the left of    1
15    8   to the left of    6
16    8   to the left of    1