What is the boy holding?
The boy is holding the toothbrush.
    src        edge_attr  dst
0     0         lying on    1
1     0          wearing    5
2     0  to the right of    6
3     0          holding    2
4     2  to the right of    6
5     3  to the right of    8
6     3  to the right of    6
7     4  to the right of    8
8     4  to the right of    6
9     5  to the right of    6
10    6   to the left of    5
11    6   to the left of    4
12    6   to the left of    0
13    6   to the left of    8
14    6   to the left of    3
15    6   to the left of    2
16    8   to the left of    3
17    8  to the right of    6
18    8   to the left of    4