Do you see zebras on the green grass?
Yes, there is a zebra on the grass.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of    9
2     0   to the left of   15
3     2   to the left of   14
4     2   to the left of    3
5     3  to the right of    2
6     3   to the left of   14
7     4   to the left of   16
8     4   to the left of    5
9     5  to the right of    4
10    5  to the right of   12
11    6   to the left of   14
12    6   to the left of    7
13    7  to the right of    6
14    7   to the left of   14
15    9  to the right of    0
16    9  to the right of   16
17   11  to the right of    0
18   11   to the left of   15
19   12   to the left of   16
20   12   to the left of    5
21   12               on   15
22   13   to the left of   14
23   13           behind   14
24   13   to the left of   15
25   14  to the right of    2
26   14      in front of   13
27   14  to the right of    6
28   14  to the right of   13
29   14  to the right of    3
30   14  to the right of    7
31   15  to the right of   11
32   15  to the right of   13
33   15  to the right of   16
34   15  to the right of    0
35   16           eating    9
36   16  to the right of   12
37   16  to the right of    4
38   16   to the left of    9
39   16               on   15
40   16   to the left of   15