Which kind of animal is the log behind of?
The log is behind the elephant.
    src        edge_attr  dst
0     1   to the left of    6
1     1   to the left of    4
2     1  to the right of   18
3     1  to the right of    7
4     1  to the right of    8
5     1  to the right of   13
6     1          holding    8
7     3  to the right of    6
8     4  to the right of   17
9     4  to the right of   20
10    4  to the right of    1
11    5   to the left of   11
12    6  to the right of    1
13    6   to the left of    3
14    6  to the right of   20
15    6  to the right of   17
16    7  to the right of   18
17    7   to the left of    1
18    7   to the left of   20
19    7  to the right of   13
20    8   to the left of    1
21    8   to the left of   20
22    8  to the right of   13
23    8  to the right of   18
24    8          wearing    7
25   10           behind   15
26   11  to the right of    5
27   11   to the left of   14
28   12  to the right of   15
29   13   to the left of    7
30   13          wearing   18
31   13   to the left of    1
32   13   to the left of   20
33   13   to the left of    8
34   14  to the right of   11
35   14  to the right of   15
36   15   to the left of   12
37   15   to the left of   14
38   15      in front of   10
39   17   to the left of    4
40   17   to the left of    6
41   18   to the left of    1
42   18   to the left of    8
43   18   to the left of    7
44   18   to the left of   20
45   20  to the right of    8
46   20  to the right of   13
47   20   to the left of    6
48   20   to the left of    4
49   20  to the right of    7
50   20  to the right of   18