What's on the chair?
The pillow is on the chair.
    src        edge_attr  dst
0     0   to the left of    4
1     1               on    0
2     2               on    0
3     4               on    0
4     4  to the right of    0
5     5  to the right of    7
6     5               on    6
7     6  to the right of    7
8     7   to the left of    6
9     7   to the left of    5
10    7  to the right of    8
11    8   to the left of    7