What does the person to the left of the passenger sit on?
The driver sits on the seat.
    src        edge_attr  dst
0     0       walking on    8
1     0   to the left of   19
2     1       sitting on    2
3     1          wearing    4
4     1  to the right of   14
..  ...              ...  ...
71   21   to the left of   18
72   22  to the right of    8
73   22   to the left of   11
74   22  to the right of   12
75   22  to the right of    3

[76 rows x 3 columns]