What's the truck in front of?
The truck is in front of the tree.
    src        edge_attr  dst
0     0   to the left of   10
1     0  to the right of   22
2     1  to the right of   10
3     2             near    9
4     2             near    6
..  ...              ...  ...
70   23  to the right of   21
71   23   to the left of   22
72   23  to the right of   14
73   23   to the left of    8
74   23           behind    9

[75 rows x 3 columns]