What's the toilet seat made of?
The toilet seat is made of plastic.
    src        edge_attr  dst
0     2  to the right of    9
1     2               on    5
2     5  to the right of    9
3     5  to the right of   10
4     5           behind    6
5     6      in front of    5
6     7  to the right of    8
7     8   to the left of    7
8     9   to the left of    5
9     9   to the left of    2
10   10               on    6
11   10   to the left of    5
12   10      standing on    3
13   10      standing on    6
14   10      standing on    1
15   12  to the right of   13
16   13   to the left of   12