What animal is in front of the animal which is in front of the stones?
The dog is in front of the elephant.
    src        edge_attr  dst
0     0           behind    8
1     0           behind    6
2     1               of    8
3     1  to the right of   10
4     3               of    7
5     3  to the right of    8
6     4               of    8
7     6           behind    8
8     6             near    8
9     6      in front of    0
10    7      in front of    8
11    7  to the right of    8
12    8           behind    7
13    8      in front of    6
14    8             near    6
15    8      in front of    0
16    8   to the left of    3
17    8   to the left of    9
18    8   to the left of    7
19    9  to the right of    8
20   10   to the left of    1