Is this a skateboard or a scooter?
This is a scooter.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of    9
2     1  to the right of    7
3     2               on    9
4     2  to the right of   13
5     2  to the right of   10
6     2  to the right of    7
7     5  to the right of   11
8     6   to the left of    8
9     7   to the left of   10
10    7   to the left of    1
11    7   to the left of    9
12    7   to the left of    2
13    8  to the right of    6
14    9  to the right of    7
15    9  to the right of    0
16   10  to the right of    7
17   10   to the left of    2
18   10  to the right of    0
19   11   to the left of    5
20   13   to the left of    2