What is plugged into the wall?
The fan is plugged into the wall.
    src        edge_attr  dst
0     0  to the right of   11
1     0  to the right of   18
2     0  to the right of    4
3     1  to the right of    4
4     1  to the right of   11
..  ...              ...  ...
58   17   to the left of    9
59   18  to the right of   11
60   18               on    3
61   18   to the left of    0
62   18  to the right of    4

[63 rows x 3 columns]