Which kind of vegetable is on the pizza?
The vegetable is a pepper.
    src        edge_attr  dst
0     0             with   17
1     0             with   18
2     1  to the right of   11
3     1  to the right of   14
4     1  to the right of   16
5     3  to the right of    9
6     5  to the right of   16
7     5  to the right of   14
8     6  to the right of   10
9     9  to the right of   18
10    9   to the left of    3
11   10               on   19
12   10   to the left of    6
13   11   to the left of    1
14   11  to the right of   16
15   11   to the left of   19
16   14   to the left of    5
17   14   to the left of    1
18   16   to the left of   11
19   16   to the left of   19
20   16   to the left of    5
21   16   to the left of    1
22   17               on    0
23   18   to the left of    9
24   18               on    0
25   19  to the right of   16
26   19  to the right of   11