What animals are in front of the tree?
The animals are giraffes.
    src        edge_attr  dst
0     0   to the left of    4
1     2   to the left of    4
2     3             near    4
3     3           behind    4
4     3            above    4
5     3  to the right of    4
6     3             near    5
7     4             near    3
8     4      in front of    3
9     4            below    3
10    4  to the right of    2
11    4  to the right of    0
12    4   to the left of    6
13    4   to the left of    3
14    5             near    3
15    6  to the right of    7
16    6  to the right of    4
17    7   to the left of    6