What's on the shelf?
The book is on the shelf.
    src        edge_attr  dst
0     0      in front of    9
1     0          next to    8
2     0             near    8
3     0  to the right of    8
4     0  to the right of    7
5     0  to the right of   12
6     0  to the right of   10
7     0  to the right of    6
8     0  to the right of   11
9     0  to the right of   21
10    0  to the right of   20
11    0  to the right of   23
12    2   to the left of    3
13    2  to the right of   11
14    3  to the right of    2
15    3  to the right of   20
16    5               on    1
17    6               on    1
18    6   to the left of    0
19    7               on    1
20    7   to the left of    0
21    8   to the left of    9
22    8      in front of    9
23    8   to the left of    0
24    8             near    0
25    8               on    7
26    9  to the right of   12
27    9  to the right of    8
28    9           behind    0
29    9           behind    8
30   10               on    1
31   10   to the left of    0
32   11   to the left of    0
33   11   to the left of    2
34   12   to the left of   16
35   12   to the left of    9
36   12   to the left of    0
37   12   to the left of   22
38   14   to the left of   18
39   14   to the left of   19
40   16  to the right of   12
41   17   to the left of   18
42   17   to the left of   19
43   18  to the right of   14
44   18  to the right of   17
45   19               on   15
46   19  to the right of   17
47   19  to the right of   14
48   20   to the left of    3
49   20               on    1
50   20   to the left of    0
51   21   to the left of    0
52   22  to the right of   12
53   23   to the left of    0