Is the truck behind a bus?
No, the truck is behind the man.
     src        edge_attr  dst
0      0   to the left of   13
1      0   to the left of   11
2      1  to the right of    6
3      1   to the left of   15
4      1   to the left of   11
..   ...              ...  ...
128   27  to the right of   26
129   27  to the right of    3
130   27  to the right of    4
131   27  to the right of    7
132   27  to the right of   10

[133 rows x 3 columns]