Is the van to the left of a bus?
No, the van is to the left of a car.
     src        edge_attr  dst
0      0           behind    1
1      0  to the right of   27
2      0  to the right of   23
3      0  to the right of    4
4      0  to the right of    2
..   ...              ...  ...
149   27   to the left of   26
150   28  to the right of    8
151   28               on   11
152   28  to the right of   21
153   28  to the right of   25

[154 rows x 3 columns]