What vehicle is to the left of the person that is wearing a shirt?
The vehicle is a bus.
    src        edge_attr  dst
0     0   to the left of   19
1     0   to the left of   15
2     0   to the left of   17
3     0   to the left of   14
4     1  to the right of   13
..  ...              ...  ...
72   18  to the right of   16
73   19   to the left of    9
74   19  to the right of    0
75   19  to the right of   15
76   19   to the left of   18

[77 rows x 3 columns]