What kind of food is to the left of the knife?
The food is a mushroom.
    src        edge_attr  dst
0     0               on    4
1     0   to the left of    8
2     1               on    4
3     1   to the left of    8
4     1  to the right of    9
5     2               of    4
6     4             with    5
7     4             with   11
8     4               on    9
9     4             with   10
10    5        on top of    4
11    5   to the left of    6
12    5               on    4
13    5   to the left of   10
14    6   to the left of   10
15    6  to the right of    5
16    8  to the right of    9
17    8       sitting on   12
18    8  to the right of    0
19    8  to the right of    1
20    9   to the left of    1
21    9   to the left of    8
22   10               on    4
23   10  to the right of    6
24   10  to the right of    5
25   11               on    4