What is the computer sitting on?
The computer is sitting on the desk.
    src        edge_attr  dst
0     0   to the left of    1
1     0       sitting on    8
2     1   to the left of    3
3     1  to the right of    0
4     2       sitting on    8
5     2        on top of    8
6     2   to the left of    3
7     3  to the right of    2
8     3  to the right of    7
9     3       sitting on    8
10    3  to the right of    1
11    3  to the right of    6
12    6   to the left of    3
13    7   to the left of    3