Which kind of device is to the left of the phone?
The device is a screen.
     src       edge_attr  dst
0      0  to the left of    8
1      0  to the left of   19
2      0  to the left of   16
3      1  to the left of    4
4      1  to the left of   26
..   ...             ...  ...
109   26  to the left of   20
110   27  to the left of    4
111   27  to the left of   11
112   27  to the left of   13
113   27  to the left of   23

[114 rows x 3 columns]