What do you think is on the ceiling?
The sign is on the ceiling.
     src        edge_attr  dst
0      0   to the left of   12
1      0   to the left of   27
2      0  to the right of   19
3      0   to the left of    6
4      0   to the left of    2
..   ...              ...  ...
117   27  to the right of   20
118   27   to the left of    2
119   27  to the right of    0
120   27   to the left of    6
121   27   to the left of   11

[122 rows x 3 columns]