What is the plant before?
The plant is in front of the windows.
     src        edge_attr  dst
0      0   to the left of   19
1      0   to the left of   13
2      0  to the right of   21
3      0   to the left of    6
4      0   to the left of    1
..   ...              ...  ...
105   21   to the left of   12
106   21   to the left of    1
107   21   to the left of    6
108   21   to the left of    0
109   21   to the left of   19

[110 rows x 3 columns]