Is that shelf made of glass or stone?
The shelf is made of glass.
    src        edge_attr  dst
0     0  to the right of    4
1     0  to the right of   13
2     0  to the right of    5
3     1  to the right of    2
4     1  to the right of    5
5     1  to the right of    4
6     1  to the right of   13
7     1   to the left of    3
8     2             near    4
9     2               by    6
10    2   to the left of    1
11    2  to the right of    5
12    2  to the right of    4
13    2   to the left of    9
14    3  to the right of    4
15    3  to the right of    1
16    3  to the right of    5
17    3  to the right of   13
18    4             near    2
19    4   to the left of    0
20    4   to the left of    1
21    4   to the left of    2
22    4   to the left of    9
23    4   to the left of    3
24    5   to the left of    9
25    5   to the left of    3
26    5               on    4
27    5   to the left of    0
28    5   to the left of    1
29    5   to the left of    2
30    6            above   10
31    7  to the right of   11
32    9  to the right of    2
33    9  to the right of   13
34    9  to the right of   10
35    9  to the right of    5
36    9  to the right of    4
37   10            under    6
38   10   to the left of    9
39   11   to the left of    7
40   11   to the left of   14
41   13   to the left of    1
42   13   to the left of    9
43   13   to the left of    0
44   13   to the left of    3
45   14  to the right of   11