What kind of vegetable is covering the hot dog?
The vegetables are onions.
    src        edge_attr  dst
0     0       sitting in   16
1     2       sitting on   11
2     2       covered by    6
3     2            above   11
4     2       sitting in    3
5     2   to the left of   13
6     2   to the left of    5
7     2               in   11
8     3   to the left of   17
9     3   to the left of   13
10    3   to the left of    5
11    5          contain   13
12    5  to the right of    2
13    5        on top of    1
14    5  to the right of    3
15    5       sitting on    1
16    5  to the right of   11
17    5  to the right of   10
18    6         covering    2
19    7   to the left of   12
20    7       sitting on    1
21   10   to the left of    5
22   10   to the left of   13
23   11       underneath    2
24   11   to the left of    5
25   11   to the left of   13
26   12   to the left of   15
27   12  to the right of    7
28   13  to the right of    2
29   13  to the right of    3
30   13  to the right of   10
31   13  to the right of   11
32   14               on    1
33   15  to the right of   12
34   16       sitting on    1
35   16               on    1
36   17  to the right of    3