What vegetable is on top of the pizza?
The vegetable is basil.
    src        edge_attr  dst
0     0  to the right of    2
1     0  to the right of   18
2     0  to the right of    6
3     0   to the left of    9
4     0  to the right of   16
..  ...              ...  ...
90   19        on top of    8
91   20  to the right of    2
92   20   to the left of    5
93   20        on top of   15
94   20   to the left of   11

[95 rows x 3 columns]