What kind of food is green, the rice or the broccoli?
The broccoli is green.
    src        edge_attr  dst
0     0   to the left of    5
1     0   to the left of    7
2     1  to the right of    4
3     1  to the right of    2
4     1               on    6
5     2   to the left of    1
6     2   to the left of    5
7     2   to the left of    7
8     3               on    6
9     3   to the left of    5
10    3   to the left of    7
11    4   to the left of    7
12    4   to the left of    1
13    5  to the right of    0
14    5  to the right of    2
15    5  to the right of    3
16    7  to the right of    2
17    7  to the right of    4
18    7  to the right of    3
19    7  to the right of    0
20    7               on    6