Is the knife silver or blue?
The knife is blue.
    src        edge_attr  dst
0     0           inside    1
1     0   to the left of    3
2     1               on    4
3     1               on    2
4     1  to the right of    8
5     1   to the left of    3
6     2   to the left of    3
7     3  to the right of    2
8     3  to the right of    1
9     3  to the right of    6
10    3  to the right of    0
11    3               on    5
12    4               on    5
13    4             with    8
14    6   to the left of    3
15    8   to the left of    1
16    8               on    4