Are there any horses or helmets that are gray?
Yes, the horse is gray.
    src        edge_attr  dst
0     3   to the left of   13
1     3   to the left of    4
2     4           riding    6
3     4               on    6
4     4          wearing   11
5     4               on    9
6     4   to the left of    6
7     4  to the right of    3
8     5  to the right of    9
9     6               in    1
10    6  to the right of    9
11    6       running in    1
12    6               in   12
13    6  to the right of   13
14    6  to the right of   14
15    6  to the right of    4
16    6  to the right of   10
17    7               on    8
18    8             near    9
19    9   to the left of   12
20    9       running in   12
21    9             near    8
22    9   to the left of    5
23    9   to the left of    6
24   10   to the left of    6
25   11               on    2
26   12  to the right of    9
27   12  to the right of   14
28   13  to the right of    3
29   13   to the left of    6
30   14   to the left of   12
31   14   to the left of    6