Is this a pizza or a sandwich?
This is a pizza.
    src        edge_attr  dst
0     0   to the left of   12
1     0  to the right of    2
2     0  to the right of    1
3     0  to the right of    5
4     0  to the right of    4
5     1   to the left of    0
6     1  to the right of    4
7     1  to the right of    2
8     1   to the left of   12
9     1  to the right of    5
10    2   to the left of    1
11    2   to the left of    0
12    2   to the left of    5
13    2   to the left of    4
14    4   to the left of   12
15    4   to the left of    1
16    4   to the left of    0
17    4  to the right of    5
18    4  to the right of    2
19    5   to the left of    0
20    5   to the left of    1
21    5   to the left of    4
22    5  to the right of    2
23    6   to the left of   12
24    7               on    8
25    7  to the right of   17
26    7  to the right of   20
27    8             with   18
28    8             with    7
29    8             with    9
30    9               on    8
31    9  to the right of   16
32   12  to the right of    1
33   12  to the right of    4
34   12  to the right of    6
35   12  to the right of    0
36   16   to the left of    9
37   17  to the right of   20
38   17   to the left of    7
39   18               on    8
40   20   to the left of   17
41   20   to the left of    7