What is the pillow on?
The pillow is on the chair.
    src        edge_attr  dst
0     0   to the left of    3
1     0   to the left of    1
2     0   to the left of   10
3     0   to the left of    9
4     1  to the right of    0
5     2               on    4
6     3  to the right of    0
7     3               on    1
8     4               by    8
9     4   to the left of    6
10    5   to the left of   10
11    5  to the right of    7
12    6   to the left of   10
13    6               on    8
14    6  to the right of    4
15    7   to the left of    5
16    9  to the right of    0
17   10  to the right of    0
18   10  to the right of    5
19   10               on    1
20   10  to the right of    6