How big is the fan?
The fan is large.
    src        edge_attr  dst
0     0   to the left of    9
1     0   to the left of   24
2     0   to the left of   13
3     0  to the right of   10
4     0   to the left of   18
..  ...              ...  ...
93   24   to the left of   12
94   24  to the right of   18
95   24   to the left of   19
96   24   to the left of   23
97   25   to the left of   12

[98 rows x 3 columns]