Is there any horse in this picture?
No, there are no horses.
    src        edge_attr  dst
0     1   to the left of    3
1     1   to the left of    2
2     1   to the left of    9
3     2   to the left of   12
4     2  to the right of    1
5     3  to the right of    1
6     3   to the left of   12
7     4   to the left of   12
8     5   to the left of    7
9     7  to the right of    5
10    8   to the left of   12
11    9   to the left of   12
12    9  to the right of    1
13   12  to the right of   13
14   12  to the right of    8
15   12  to the right of    3
16   12  to the right of    9
17   12  to the right of    4
18   12  to the right of    2
19   13   to the left of   12