Which kind of animal are the trees behind of?
The trees are behind the elephant.
    src        edge_attr  dst
0     0   to the left of    5
1     0   to the left of    1
2     1  to the right of    7
3     1  to the right of    0
4     1   to the left of    4
5     1   to the left of    3
6     3  to the right of    1
7     4      in front of    5
8     4  to the right of    1
9     4      standing in    3
10    5           behind    4
11    5  to the right of    0
12    6             near    7
13    7          next to    6
14    7   to the left of    1