Do the shower and the faucet have the same material?
No, the shower is made of glass and the faucet is made of metal.
    src        edge_attr  dst
0     1   to the left of   10
1     2   to the left of    4
2     2   to the left of   12
3     2   to the left of   11
4     3   to the left of   12
5     4  to the right of    2
6     4  to the right of    7
7     5   to the left of   10
8     6   to the left of   12
9     7   to the left of   12
10    7   to the left of   11
11    7   to the left of    4
12   10  to the right of    5
13   10  to the right of    1
14   11  to the right of    7
15   11  to the right of    2
16   12  to the right of    7
17   12  to the right of    6
18   12  to the right of    3
19   12  to the right of   13
20   12  to the right of    2
21   13   to the left of   12