The animal in front of the grass is of what color?
The zebra is black.
    src        edge_attr  dst
0     0   to the left of    5
1     1  to the right of    5
2     2  to the right of    5
3     3  to the right of    5
4     4            above    6
5     4      in front of    6
6     4      standing in    6
7     4      in front of    5
8     5           behind    4
9     5   to the left of    1
10    5  to the right of    0
11    5   to the left of    3
12    5   to the left of    2
13    5   to the left of    8
14    5   to the left of    7
15    6            under    4
16    6       underneath    4
17    6            below    4
18    6           behind    4
19    7  to the right of    5
20    8  to the right of    5