What are the vegetables on the onion pizza?
The vegetables are tomatoes.
     src        edge_attr  dst
0      0   to the left of   26
1      0  to the right of   24
2      0   to the left of   27
3      0   to the left of   21
4      0  to the right of    1
..   ...              ...  ...
226   38  to the right of   19
227   38  to the right of   17
228   38  to the right of    2
229   38  to the right of   26
230   38   to the left of   36

[231 rows x 3 columns]