On which side is the truck?
The truck is on the left of the image.
     src        edge_attr  dst
0      0  to the right of   21
1      1  to the right of   18
2      1   to the left of    7
3      1  to the right of   21
4      1  to the right of   10
..   ...              ...  ...
101   21   to the left of   13
102   22               on   20
103   22           beside    5
104   22  to the right of   21
105   22   to the left of   10

[106 rows x 3 columns]