What animal is on the fence near the tree?
The birds are on the fence.
    src        edge_attr  dst
0     1          holding    4
1     1         carrying    4
2     1   to the left of   13
3     1   to the left of    6
4     2             near   13
5     3  to the right of    9
6     4   to the left of   13
7     6  to the right of    9
8     6  to the right of    1
9     6               on   13
10    6             near   13
11    7   to the left of   13
12    9             near   13
13    9   to the left of    3
14    9   to the left of   13
15    9   to the left of    6
16   13             near    9
17   13             near    2
18   13             near    6
19   13  to the right of    9
20   13  to the right of    7
21   13  to the right of    4
22   13  to the right of    1