Is the black device on the right or on the left?
The camera is on the left of the image.
    src        edge_attr  dst
0     0  to the right of   18
1     0  to the right of    1
2     1   to the left of    0
3     1  to the right of   18
4     3  to the right of    4
..  ...              ...  ...
95   21  to the right of   19
96   22  to the right of   18
97   22          hitting   19
98   22   to the left of   20
99   22   to the left of   13

[100 rows x 3 columns]