What is the zebra in front of?
The zebra is in front of the fence.
    src        edge_attr  dst
0     0           behind    9
1     0             near    7
2     0           around    9
3     0             near    4
4     1   to the left of    4
5     2   to the left of    4
6     4  to the right of    9
7     4  to the right of    5
8     4             near    0
9     4  to the right of    2
10    4  to the right of    1
11    5   to the left of    4
12    6  to the right of   11
13    7             near    0
14    8            below    9
15    9   to the left of    4
16    9      in front of    0
17   10  to the right of   11
18   11   to the left of    6
19   11   to the left of   10