Which kind of food is not open?
The food is a cabbage.
    src        edge_attr  dst
0     0               on    1
1     0   to the left of    7
2     1               on    4
3     1             with    0
4     1  to the right of    9
5     1  to the right of    2
6     1  to the right of    4
7     1  to the right of    3
8     2   to the left of    1
9     2             with    4
10    3               on    4
11    3   to the left of    1
12    4             with    9
13    4               in    2
14    4               on    2
15    4             with    3
16    4   to the left of    1
17    7  to the right of    0
18    9               on    4
19    9   to the left of    1
20   10               on    6