The knife to the left of the plate lies on what?
The knife lies on the tray.
    src        edge_attr  dst
0     1  to the right of    6
1     1  to the right of    5
2     2   to the left of   12
3     3         lying on    0
4     3               on    0
5     3   to the left of   12
6     4   to the left of    7
7     4       resting on   16
8     4   to the left of    6
9     5   to the left of   12
10    5   to the left of    9
11    5   to the left of   15
12    5   to the left of    1
13    5   to the left of   10
14    6   to the left of   10
15    6   to the left of    1
16    6  to the right of    4
17    6   to the left of   12
18    7  to the right of    4
19    9               in   10
20    9  to the right of    5
21   10  to the right of    6
22   10  to the right of    5
23   12  to the right of    5
24   12  to the right of   14
25   12  to the right of   13
26   12  to the right of    6
27   12  to the right of    2
28   12  to the right of    3
29   13               on    7
30   13   to the left of   12
31   14   to the left of   12
32   14               on    0
33   15  to the right of    5