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