Which material is this pan made of, glass or aluminum?
The pan is made of glass.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of   19
2     2   to the left of   19
3     2   to the left of   15
4     3   to the left of   19
5     5   to the left of    6
6     6  to the right of    5
7     7   to the left of   14
8     7   to the left of   20
9     7   to the left of   13
10    7   to the left of   10
11    7   to the left of   18
12    9  to the right of   14
13   10   to the left of   19
14   10  to the right of    7
15   10  to the right of   20
16   11   to the left of   19
17   11  to the right of    0
18   12   to the left of   19
19   13  to the right of    7
20   13  to the right of   20
21   13   to the left of   19
22   14   to the left of   16
23   14  to the right of    7
24   14   to the left of    9
25   14   to the left of   19
26   15  to the right of    2
27   15   to the left of   19
28   16  to the right of   14
29   17   to the left of   19
30   18  to the right of    7
31   18   to the left of   19
32   19  to the right of    2
33   19  to the right of   18
34   19  to the right of   17
35   19  to the right of   13
36   19  to the right of   15
37   19  to the right of   12
38   19  to the right of   11
39   19  to the right of   14
40   19  to the right of    0
41   19  to the right of   10
42   19  to the right of    3
43   20  to the right of    7
44   20   to the left of   13
45   20   to the left of   10