Is the knife in the top part of the image?
Yes, the knife is in the top of the image.
    src        edge_attr  dst
0     0   to the left of   16
1     0  to the right of    6
2     1  to the right of    2
3     2   to the left of    1
4     4   to the left of    5
5     5  to the right of    4
6     6   to the left of    0
7     6   to the left of    7
8     7   to the left of   16
9     7  to the right of    6
10    8               on   14
11   14             with    8
12   16  to the right of    0
13   16  to the right of    7