What is he in front of?
The man is in front of the tree.
    src        edge_attr  dst
0     0           behind    6
1     0      in front of    8
2     6               in   13
3     6            above    7
4     6      in front of    0
5     6          holding    5
6     6         catching    5
7     6          wearing    4
8     6          wearing    1
9     6  to the right of    9
10    7            below    6
11    8           behind    0
12    8  to the right of    9
13    9   to the left of    8
14    9   to the left of    6
15   11   to the left of   12
16   12  to the right of   11