What is the color of the ceiling?
The ceiling is white.
    src        edge_attr  dst
0     0  to the right of    3
1     1   to the left of    7
2     3   to the left of    0
3     5   to the left of   15
4     5   to the left of   10
5     5               on   13
6     6   to the left of    7
7     6   to the left of   14
8     6   to the left of   12
9     7          wearing   14
10    7           behind   13
11    7  to the right of    9
12    7       sitting at   13
13    7  to the right of    6
14    7  to the right of    1
15    9   to the left of    7
16    9          holding    8
17    9   to the left of   14
18    9   to the left of   12
19    9       sitting at   13
20   10  to the right of    5
21   12  to the right of    9
22   12  to the right of    6
23   13      in front of    7
24   14  to the right of    9
25   14  to the right of    6
26   15               on   10
27   15  to the right of    5