Is there a backpack to the right of the person that is wearing sandals?
No, there is a frisbee to the right of the man.
    src        edge_attr  dst
0     0               on   20
1     1  to the right of   18
2     1   to the left of    7
3     1  to the right of   11
4     2   to the left of    5
5     2   to the left of   17
6     5  to the right of    2
7     5  to the right of   19
8     7  to the right of    1
9     8  to the right of   10
10   10   to the left of    8
11   10  to the right of   11
12   10  to the right of   15
13   11   to the left of   10
14   11          wearing    6
15   11         throwing    1
16   11               on    4
17   11          wearing   17
18   11          wearing   18
19   11          wearing   19
20   11   to the left of    1
21   13  to the right of   16
22   13   to the left of   14
23   14  to the right of   13
24   15         lying on    4
25   15  to the right of   18
26   15   to the left of   10
27   16   to the left of   13
28   17  to the right of    2
29   17  to the right of   19
30   18   to the left of    1
31   18   to the left of   15
32   19   to the left of    5
33   19   to the left of   17