What's in front of the worker?
The truck is in front of the worker.
    src        edge_attr  dst
0     0  to the right of    7
1     1  to the right of    7
2     1   to the left of    2
3     2  to the right of    1
4     2  to the right of    7
..  ...              ...  ...
88   23  to the right of   16
89   24   to the left of    9
90   24  to the right of   16
91   24   to the left of    4
92   24  to the right of    8

[93 rows x 3 columns]