What color is the icing on the cake?
The icing is blue.
    src        edge_attr  dst
0     0   to the left of    6
1     0   to the left of    2
2     1   to the left of    6
3     1   to the left of    5
4     1   to the left of    2
5     2  to the right of    7
6     2  to the right of    1
7     2  to the right of    0
8     2  to the right of    8
9     5  to the right of    1
10    6  to the right of    0
11    6  to the right of    1
12    7   to the left of    2
13    8   to the left of    2
14    8               on    1