Is the knife on a mirror?
No, the knife is on the table.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of    1
2     1  to the right of    2
3     1               on    4
4     1  to the right of    9
5     1  to the right of    0
6     2               on    3
7     2   to the left of    4
8     2   to the left of    1
9     4  to the right of    2
10    4  to the right of    0
11    5   to the left of   11
12    5   to the left of    6
13    6  to the right of   10
14    6               on    7
15    6  to the right of    5
16    7               of    6
17    7               on    3
18    8   to the left of    9
19    9   to the left of    1
20    9  to the right of    8
21   10   to the left of    6
22   10   to the left of   11
23   10               on    7
24   10               in    5
25   10           inside    5
26   11  to the right of   10
27   11               on    7
28   11  to the right of    5