Is the knife in the top part or in the bottom of the image?
The knife is in the top of the image.
    src        edge_attr  dst
0     0  to the right of   13
1     0  to the right of    2
2     0  to the right of    8
3     0  to the right of    5
4     1  to the right of    9
5     2  to the right of    8
6     2   to the left of    0
7     3   to the left of    8
8     5   to the left of    0
9     7   to the left of   12
10    8  to the right of    3
11    8  to the right of   12
12    8   to the left of    2
13    8   to the left of    0
14    9   to the left of    1
15    9               on   10
16    9   to the left of   11
17   11  to the right of    9
18   12  to the right of    7
19   12   to the left of    8
20   13   to the left of    0