What's the dog standing on?
The dog is standing on the skateboard.
    src        edge_attr  dst
0     0   to the left of   10
1     0      standing on   14
2     0      in front of    4
3     1   to the left of   12
4     2   to the left of    5
5     2   to the left of   13
6     4           behind    0
7     5  to the right of    6
8     5   to the left of   13
9     5  to the right of    2
10    6   to the left of   13
11    6   to the left of    5
12    8   to the left of    9
13    8             near   10
14    9  to the right of    8
15   10  to the right of    0
16   10          next to    8
17   12  to the right of    1
18   13  to the right of    2
19   13  to the right of    5
20   13  to the right of    6
21   14         lying on    4