Is the couple behind the person on the right side?
Yes, the couple is behind the man.
    src        edge_attr  dst
0     1      in front of   12
1     1      in front of    7
2     1      in front of    8
3     1      in front of    6
4     1  to the right of    5
5     1  to the right of    3
6     1  to the right of    7
7     2  to the right of   12
8     2               in    0
9     3  to the right of    6
10    3   to the left of   10
11    3               in    0
12    3   to the left of    1
13    5               on    4
14    5   to the left of    1
15    5   to the left of    9
16    5   to the left of    7
17    6           behind    1
18    6   to the left of    3
19    7  to the right of    5
20    7   to the left of    9
21    7   to the left of    1
22    7           behind    1
23    8           behind    1
24    9  to the right of    5
25    9  to the right of    7
26   10  to the right of    3
27   12           behind    1
28   12   to the left of    2