What item of furniture is this?
This is a bookcase.
    src        edge_attr  dst
0     1           behind    7
1     2   to the left of    3
2     3  to the right of    2
3     3  to the right of    6
4     4   to the left of   10
5     4   to the left of   12
6     4  to the right of    6
7     5               of    7
8     5  to the right of   11
9     5  to the right of    6
10    5   to the left of   12
11    5   to the left of   10
12    6   to the left of    3
13    6   to the left of    4
14    6   to the left of    5
15    6   to the left of   10
16    6   to the left of   12
17    7   to the left of   12
18    7   to the left of   10
19    7               in    0
20    7      in front of    1
21    7            using   11
22   10               in    9
23   10  to the right of    6
24   10  to the right of    5
25   10  to the right of    4
26   10  to the right of    7
27   11            using    0
28   11   to the left of    5
29   11               of    7
30   12  to the right of    7
31   12  to the right of    6
32   12  to the right of    5
33   12  to the right of    4
34   12               on    4