What is the bottle made of?
The bottle is made of glass.
    src        edge_attr  dst
0     0  to the right of   13
1     0               on    6
2     0  to the right of   14
3     0  to the right of   18
4     1  to the right of    5
5     1   to the left of    3
6     1   to the left of    6
7     1   to the left of   11
8     2   to the left of   10
9     2   to the left of   17
10    2   to the left of   11
11    3  to the right of    5
12    3  to the right of    1
13    3   to the left of    6
14    3   to the left of   11
15    4  to the right of   19
16    4  to the right of   12
17    5   to the left of    1
18    5   to the left of    3
19    5   to the left of    6
20    6  to the right of   15
21    6  to the right of   18
22    6  to the right of    1
23    6  to the right of    3
24    6  to the right of    5
25    6  to the right of   14
26    6  to the right of   13
27    7  to the right of   15
28    8  to the right of   12
29    8  to the right of   19
30    8               on    7
31    9  to the right of   16
32    9  to the right of   12
33   10  to the right of    2
34   11  to the right of    2
35   11  to the right of    3
36   11  to the right of    1
37   12               on   19
38   12   to the left of    4
39   12   to the left of    9
40   12   to the left of    8
41   13   to the left of    6
42   13   to the left of    0
43   14   to the left of    0
44   14   to the left of    6
45   15   to the left of    7
46   15   to the left of    6
47   16   to the left of    9
48   17  to the right of    2
49   18   to the left of    0
50   18   to the left of    6
51   19   to the left of    8
52   19   to the left of    4