Who is on the skateboard?
The guy is on the skateboard.
    src        edge_attr  dst
0     0  to the right of    4
1     0   to the left of    2
2     0  to the right of    5
3     2  to the right of    8
4     2  to the right of    0
5     4   to the left of    8
6     4  to the right of    5
7     4   to the left of    0
8     5   to the left of    4
9     5   to the left of    0
10    5   to the left of    8
11    6               by    2
12    8  to the right of    5
13    8               on    1
14    8  to the right of    4
15    8   to the left of    2