Is the fan made of plastic?
No, the fan is made of stainless steel.
     src        edge_attr  dst
0      1   to the left of   20
1      1   to the left of   35
2      2     hanging from    0
3      3   to the left of    6
4      3   to the left of    4
..   ...              ...  ...
189   41   to the left of   39
190   41   to the left of   42
191   42  to the right of   41
192   42   to the left of   39
193   43     hanging from    0

[194 rows x 3 columns]