Which kind of furniture is in front of the mirror?
The piece of furniture is a shelf.
    src        edge_attr  dst
0     6   to the left of    7
1     7  to the right of    6
2    10               on    3
3    10           behind   11
4    10   to the left of   12
5    10   to the left of   13
6    10  to the right of   14
7    10  to the right of   15
8    11      in front of   10
9    12               on    3
10   12  to the right of   10
11   13  to the right of   15
12   13  to the right of   10
13   13               on    3
14   14   to the left of   10
15   14               on    3
16   15               on    3
17   15   to the left of   13
18   15   to the left of   10