What is the color of the book in the top?
The book is orange.
    src        edge_attr  dst
0     0         covering   11
1     0   to the left of    7
2     0       resting on    1
3     0   to the left of    5
4     0   to the left of    2
5     0   to the left of    6
6     2  to the right of    0
7     2  to the right of   11
8     2   to the left of    5
9     3   to the left of   10
10    3        on top of    1
11    3  to the right of    9
12    3  to the right of    4
13    4   to the left of    3
14    5  to the right of    0
15    5  to the right of    2
16    5  to the right of    6
17    6  to the right of    0
18    6   to the left of    5
19    6  to the right of   11
20    7  to the right of    0
21    9   to the left of    3
22    9         lying on    1
23   10  to the right of    3
24   11       covered by    0
25   11   to the left of    2
26   11   to the left of    6