Are there any screens to the left of the people that are standing?
Yes, there is a screen to the left of the people.
     src         edge_attr  dst
0      0  standing against   30
1      0   to the right of    5
2      0   to the right of   13
3      0    to the left of   24
4      0    to the left of   17
..   ...               ...  ...
253   46   to the right of   25
254   46   to the right of   30
255   46   to the right of    8
256   46   to the right of    6
257   46   to the right of   42

[258 rows x 3 columns]