What is the material of the mirror on the wall?
The mirror is made of glass.
    src        edge_attr  dst
0     0   to the left of    9
1     0  to the right of    6
2     0  to the right of    1
3     1   to the left of    8
4     1   to the left of    7
5     1   to the left of    0
6     1   to the left of    5
7     1   to the left of    4
8     2               on   11
9     3   to the left of    4
10    4  to the right of    3
11    4  to the right of    1
12    4  to the right of    6
13    5               on    8
14    5   to the left of    9
15    5  to the right of    1
16    6   to the left of    8
17    6   to the left of    4
18    6   to the left of    0
19    7  to the right of    1
20    7   to the left of    9
21    8  to the right of    1
22    8  to the right of    6
23    8   to the left of    9
24    9  to the right of    5
25    9  to the right of    7
26    9  to the right of    0
27    9  to the right of    8