Is the person to the left of the bus riding a bike?
Yes, the person is riding a bike.
    src        edge_attr  dst
0     0   to the left of   12
1     1   to the left of   15
2     1   to the left of   16
3     2   to the left of   15
4     2   to the left of   16
..  ...              ...  ...
83   22           riding   12
84   22  to the right of   23
85   22  to the right of   19
86   23   to the left of   22
87   23   to the left of   12

[88 rows x 3 columns]