What kind of device is to the left of the person that is of the bus?
The device is a camera.
     src        edge_attr  dst
0      0   to the left of   11
1      0  to the right of   22
2      0  to the right of   21
3      0   to the left of   17
4      0  to the right of    8
..   ...              ...  ...
108   22   to the left of    0
109   22          holding    1
110   22          wearing   10
111   22   to the left of   16
112   22   to the left of   15

[113 rows x 3 columns]