Is this a pizza or a sandwich?
This is a sandwich.
    src        edge_attr  dst
0     1        on top of    9
1     3  to the right of   13
2     3  to the right of   12
3     6  to the right of   12
4     7  to the right of   13
5     7  to the right of   12
6     8          holding   10
7     8           biting   10
8    10        on top of   11
9    12   to the left of    6
10   12   to the left of    3
11   12   to the left of    7
12   13   to the left of    7
13   13   to the left of    3