What kind of furniture is the food on?
The food is on the desk.
    src        edge_attr  dst
0     0               of    5
1     0               on    5
2     0  to the right of    4
3     0   to the left of    1
4     0   to the left of    6
5     1               on    5
6     1  to the right of    0
7     2               on    5
8     3               on    5
9     3               on    2
10    4   to the left of    0
11    4           behind    5
12    5      in front of    4
13    6               on    5
14    6  to the right of    0