Do you see any books to the right of the computer?
No, there is a tray to the right of the computer.
    src        edge_attr  dst
0     0   to the left of    4
1     0  to the right of   10
2     0   to the left of   14
3     0   to the left of   12
4     1  to the right of   13
5     1   to the left of   14
6     2  to the right of   11
7     4  to the right of    0
8     4  to the right of    5
9     5   to the left of   12
10    5               on   15
11    5       sitting on   15
12    5   to the left of    4
13    5               on    3
14    6   to the left of   12
15    7  to the right of   13
16    7               on    3
17    8   to the left of   12
18   10   to the left of    0
19   10   to the left of   15
20   11   to the left of    2
21   12  to the right of    0
22   12  to the right of    8
23   12  to the right of    5
24   12  to the right of    6
25   13   to the left of    7
26   13   to the left of    1
27   13               on    3
28   13   to the left of   14
29   14               on    3
30   14  to the right of    0
31   14  to the right of    1
32   14  to the right of   13
33   14  to the right of   15
34   15  to the right of   10
35   15   to the left of   14