What is he on?
The man is on the motorbike.
    src        edge_attr  dst
0     3  to the right of    6
1     3   to the left of   13
2     3   to the left of   10
3     5               on    8
4     6   to the left of   13
5     6   to the left of    3
6     6   to the left of   10
7    10  to the right of    3
8    10  to the right of    6
9    13  to the right of    3
10   13  to the right of    6