What is the bowl made of?
The bowl is made of glass.
    src        edge_attr  dst
0     1           inside    0
1     1               on    3
2     1  to the right of    3
3     2           inside    0
4     2  to the right of    3
5     2       covered by    5
6     3   to the left of    2
7     3           inside    0
8     3   to the left of    1
9     5           inside    0
10    5         covering    2