What kind of food is to the left of the pizza slice?
The food is a mushroom.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of   12
2     0  to the right of    7
3     1  to the right of   14
4     1  to the right of   10
5     2   to the left of    9
6     2   to the left of   10
7     2   to the left of    5
8     3  to the right of   10
9     4   to the left of   15
10    4   to the left of    9
11    5  to the right of    2
12    5   to the left of    0
13    7   to the left of    0
14    8   to the left of   13
15    8   to the left of   16
16    8  to the right of   15
17    9  to the right of    2
18    9  to the right of    4
19   10   to the left of    3
20   10   to the left of    1
21   10  to the right of    2
22   12   to the left of    0
23   13  to the right of    8
24   14   to the left of    1
25   15  to the right of    4
26   15   to the left of    8
27   16  to the right of    8