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