What vehicle is the man behind of?
The man is behind the truck.
    src        edge_attr  dst
0     0          holding   11
1     0   to the left of   12
2     0           behind    7
3     0           beside   11
4     0   to the left of    9
..  ...              ...  ...
81   14   to the left of    9
82   15  to the right of   10
83   15               on    3
84   16   to the left of    3
85   17   to the left of    3

[86 rows x 3 columns]