Is the helmet to the left or to the right of the man the mirror is to the left of?
The helmet is to the right of the man.
     src        edge_attr  dst
0      0   to the left of   18
1      0   to the left of   19
2      0               on    1
3      1   to the left of   19
4      1   to the left of   12
..   ...              ...  ...
134   20   to the left of    7
135   20  to the right of    3
136   20  to the right of   15
137   20  to the right of    5
138   20   to the left of   14

[139 rows x 3 columns]