Are there either cows or fences in the picture?
Yes, there are cows.
    src        edge_attr  dst
0     1  to the right of    4
1     1   to the left of    9
2     2  to the right of    4
3     2   to the left of    9
4     4   to the left of   13
5     4   to the left of    2
6     4   to the left of   11
7     4   to the left of   12
8     4   to the left of    1
9     4   to the left of   14
10    4   to the left of   15
11    4   to the left of    9
12    9  to the right of   14
13    9  to the right of   15
14    9  to the right of   17
15    9  to the right of   12
16    9  to the right of   11
17    9  to the right of    1
18    9  to the right of    4
19    9  to the right of    2
20    9  to the right of   13
21   11   to the left of    9
22   11  to the right of    4
23   12  to the right of    4
24   12   to the left of    9
25   13  to the right of    4
26   13   to the left of    9
27   13               in    1
28   14   to the left of    9
29   14  to the right of    4
30   14               on   15
31   15   to the left of    9
32   15  to the right of    4
33   17   to the left of    9