What is on the ceiling?
The chandelier is on the ceiling.
    src        edge_attr  dst
0     0               on    3
1     0  to the right of    5
2     1  to the right of    2
3     1  to the right of    4
4     2   to the left of    1
5     3   to the left of    4
6     4  to the right of    3
7     4               on    2
8     4   to the left of    1
9     5   to the left of    0
10    7               on    6