What is the person behind the bag holding?
The boy is holding the umbrella.
    src        edge_attr  dst
0     0  to the right of    3
1     0  to the right of   12
2     0           behind    1
3     0          holding    7
4     1      in front of    0
5     1  to the right of   13
6     2  to the right of    3
7     3   to the left of   11
8     3   to the left of    2
9     3   to the left of    9
10    3   to the left of    0
11    4  to the right of   12
12    9  to the right of    3
13   11  to the right of    3
14   12   to the left of    0
15   12   to the left of    4
16   13   to the left of    1
17   14               of    2