What are the people that are to the left of the helmet watching, a horse or a zebra?
The people are watching a horse.
    src        edge_attr  dst
0     0  to the right of    1
1     1   to the left of    0
2     1         watching    2
3     2     jumping over    3
4     3  to the right of    8
5     3  to the right of    6
6     5   to the left of   10
7     5  to the right of   11
8     6   to the left of    3
9     8   to the left of    9
10    8   to the left of    3
11    9   to the left of   10
12    9  to the right of    8
13   10  to the right of   11
14   10  to the right of    5
15   10  to the right of    9
16   11   to the left of    5
17   11   to the left of   10