What is the vegetable that this pizza is topped with called?
The vegetable is basil.
    src        edge_attr  dst
0     0      topped with    1
1     0       covered by   14
2     0      topped with   12
3     0             with   14
4     0  to the right of    9
5     0      topped with    4
6     0      topped with    5
7     0      topped with    6
8     0      topped with   13
9     0             with    2
10    1  to the right of    5
11    1  to the right of    6
12    2  to the right of    9
13    2               on    0
14    2   to the left of   15
15    5   to the left of    6
16    5   to the left of    1
17    5  to the right of    9
18    6   to the left of    1
19    6  to the right of    5
20    7   to the left of   12
21    9   to the left of    2
22    9   to the left of   14
23    9   to the left of    5
24    9   to the left of    0
25   12   to the left of   15
26   12  to the right of    7
27   14         covering    0
28   14   to the left of   15
29   14               on    0
30   14  to the right of    9
31   15  to the right of   12
32   15  to the right of   14
33   15  to the right of    2