What is the skateboard sitting on?
The skateboard is sitting on the street.
    src         edge_attr  dst
0     0        walking by   10
1     0     walking along    1
2     0           wearing   11
3     0           wearing    9
4     0           wearing    3
5     0           wearing    7
6     0   walking next to   10
7     0        walking on    1
8     0       standing on    1
9     0  standing next to   10
10    0   to the right of    8
11    0           wearing    2
12    0    to the left of   10
13    2                on    5
14    2   to the right of    8
15    4                on    1
16    4        sitting on    1
17    5   to the right of    8
18    5                of    0
19    7   to the right of    8
20    8    to the left of    2
21    8    to the left of    0
22    8    to the left of    7
23    8    to the left of    5
24    8    to the left of   11
25    8    to the left of   10
26    8    to the left of   12
27   10   to the right of    0
28   10   to the right of    8
29   10   to the right of   11
30   11   to the right of    8
31   11    to the left of   10
32   12   to the right of    8
33   12                of    0