What is on the ceiling?
The light fixture is on the ceiling.
     src        edge_attr  dst
0      0               in   10
1      0   to the left of   29
2      0   to the left of   18
3      0   to the left of   26
4      0  to the right of   27
..   ...              ...  ...
102   29   to the left of   13
103   29   to the left of   23
104   29   to the left of   28
105   29  to the right of    0
106   29  to the right of   18

[107 rows x 3 columns]