What is the bus in front of?
The bus is in front of the hills.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of    9
2     1  to the right of   21
3     1             near   18
4     1  to the right of   12
..  ...              ...  ...
95   21   on the side of   18
96   21   to the left of    1
97   21        parked by    7
98   21             near    7
99   21      in front of    6

[100 rows x 3 columns]