Is the couple sitting?
Yes, the couple is sitting.
    src        edge_attr  dst
0     0   to the left of   11
1     1   to the left of    8
2     1   to the left of    6
3     2               on    4
4     2   to the left of    6
5     6  to the right of    8
6     6               on    7
7     6  to the right of    1
8     6  to the right of    2
9     8   to the left of    6
10    8  to the right of    1
11   11  to the right of    0