What is the name of the vegetable that is to the left of the potato with the sauce?
The vegetable is an onion.
    src        edge_attr  dst
0     0               of    8
1     0  to the right of    2
2     0  to the right of    7
3     0               on   14
4     1               on    9
5     1  to the right of    2
6     2   to the left of    1
7     2   to the left of    0
8     4               of   12
9     5  to the right of    9
10    5  to the right of   15
11    6  to the right of    9
12    6               on    8
13    7   to the left of   14
14    7   to the left of    0
15    7   to the left of   11
16    7   to the left of    9
17    8  to the right of    9
18    8               on    4
19    9   to the left of   12
20    9   to the left of    5
21    9   to the left of    6
22    9  to the right of   13
23    9  to the right of    7
24    9               on    4
25    9   to the left of    8
26   10               on    8
27   11               on   14
28   11  to the right of    7
29   12  to the right of    9
30   13   to the left of    9
31   13   to the left of   14
32   14             with   11
33   14             with    0
34   14  to the right of    7
35   14               on    4
36   14  to the right of   13
37   15   to the left of    5