Are there any zebras in the river?
No, there is a man in the river.
    src        edge_attr  dst
0     0   to the left of    3
1     0   to the left of    2
2     0   to the left of   10
3     0   to the left of   11
4     1   to the left of   10
5     1   to the left of   11
6     1   to the left of   12
7     1   to the left of   15
8     1   to the left of    3
9     1   to the left of    2
10    2   to the left of    6
11    2  to the right of    1
12    2  to the right of    0
13    3  to the right of    0
14    3   to the left of   14
15    3   to the left of   15
16    3  to the right of    1
17    3   to the left of    6
18    3   to the left of    4
19    3   to the left of   11
20    4               in    5
21    4  to the right of   15
22    4  to the right of    3
23    4  to the right of   11
24    6  to the right of    2
25    6  to the right of   10
26    6  to the right of    3
27    6  to the right of   11
28    9  to the right of   10
29    9  to the right of   12
30   10   to the left of    6
31   10  to the right of    1
32   10   to the left of    9
33   10   to the left of   12
34   10          wearing    0
35   10  to the right of   16
36   10  to the right of    0
37   11   to the left of   14
38   11  to the right of    0
39   11   to the left of    4
40   11   to the left of    6
41   11  to the right of    1
42   11  to the right of    3
43   12  to the right of   10
44   12  to the right of    1
45   12   to the left of    9
46   14  to the right of    3
47   14  to the right of   11
48   14  to the right of   15
49   15  to the right of    3
50   15  to the right of   16
51   15   to the left of   14
52   15   to the left of    4
53   15  to the right of    1
54   16   to the left of   15
55   16   to the left of   10