What is the dog on?
The dog is on the motorcycle.
    src        edge_attr  dst
0     0  to the right of   12
1     1   to the left of    7
2     1  to the right of   12
3     2  to the right of    5
4     2  to the right of    3
5     3   to the left of    2
6     3  to the right of   12
7     5  to the right of   12
8     5   to the left of    2
9     7  to the right of   12
10    7  to the right of   15
11    7  to the right of    1
12    9               on    8
13    9          wearing   14
14    9       sitting on    6
15    9          wearing    5
16    9       sitting on    8
17    9  to the right of   12
18    9          wearing   13
19   10               on    8
20   12   to the left of    9
21   12   to the left of    3
22   12   to the left of    7
23   12   to the left of   14
24   12   to the left of    1
25   12   to the left of   15
26   12   to the left of    5
27   12   to the left of    0
28   14  to the right of   12
29   15   to the left of    7
30   15  to the right of   12