What kind of animal is the fence behind of?
The fence is behind the elephant.
    src        edge_attr  dst
0     1           behind    9
1     1  to the right of    4
2     1  to the right of    2
3     1  to the right of    9
4     2  to the right of    4
5     2   to the left of    1
6     3            below    9
7     4   to the left of    2
8     4   to the left of    1
9     4   to the left of    5
10    5      in front of    9
11    5  to the right of    4
12    5  to the right of    9
13    6               on    9
14    7           behind    9
15    7           around    9
16    8            below    9
17    8  to the right of    9
18    8       underneath    9
19    9            above    8
20    9      in front of    7
21    9           behind    5
22    9            above    3
23    9           eating    8
24    9   to the left of    1
25    9   to the left of    8
26    9   to the left of    5
27    9               on    8