What is on the ceiling?
The fans are on the ceiling.
    src        edge_attr  dst
0     1               on   32
1     2  to the right of   26
2     2  to the right of   25
3     2  to the right of   11
4     2   to the left of   27
..  ...              ...  ...
75   27  to the right of   10
76   29   to the left of   18
77   30   to the left of    9
78   30  to the right of   20
79   30  to the right of   24

[80 rows x 3 columns]