Which kind of vegetable is green?
The vegetable is broccoli.
    src        edge_attr  dst
0     0   to the left of    5
1     0  to the right of    6
2     1   to the left of    9
3     1   to the left of    3
4     1   to the left of    2
5     2  to the right of    1
6     3  to the right of    1
7     3  to the right of    8
8     5  to the right of    0
9     6   to the left of    0
10    8   to the left of    3
11    9  to the right of    1