What's the dog carrying?
The dog is carrying a skateboard.
    src        edge_attr  dst
0     0   to the left of    9
1     1   to the left of   11
2     2  to the right of    7
3     2  to the right of    6
4     2  to the right of    9
5     5  to the right of    6
6     6   to the left of    2
7     6   to the left of    5
8     6   to the left of   11
9     7   to the left of   11
10    7   to the left of    9
11    7   to the left of    2
12    9               on   11
13    9  to the right of    0
14    9  to the right of    7
15    9   to the left of    2
16   11          wearing    9
17   11         carrying    6
18   11  to the right of    1
19   11  to the right of    6
20   11  to the right of    7