What do you think the chairs are made of?
The chairs are made of metal.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of    6
2     0  to the right of   12
3     0  to the right of    3
4     1   to the left of    5
5     2   to the left of    5
6     3   to the left of    4
7     3   to the left of    6
8     3   to the left of    0
9     3   to the left of   12
10    4  to the right of    3
11    4  to the right of    0
12    4  to the right of   12
13    5  to the right of    1
14    5  to the right of    2
15    6  to the right of    3
16    6  to the right of    0
17    6  to the right of   12
18   12   to the left of    6
19   12  to the right of    3
20   12   to the left of    0
21   12   to the left of    4