On what is the toothbrush lying?
The toothbrush is lying on the desk.
    src        edge_attr  dst
0     0  to the right of   11
1     1       sitting on    9
2     1         lying on    9
3     1   to the left of    3
4     1  to the right of    4
5     1  to the right of   11
6     2   to the left of    6
7     2   to the left of    8
8     2   to the left of    5
9     3       sitting on    9
10    3  to the right of   12
11    3  to the right of    1
12    3               on    9
13    4   to the left of    1
14    4   to the left of    7
15    4         lying on    9
16    4   to the left of   13
17    5         lying on    9
18    5  to the right of    2
19    6  to the right of    2
20    7         lying on    9
21    7  to the right of    4
22    7  to the right of   13
23    8         lying on    9
24    8       sitting on    9
25    8  to the right of    2
26   10       sitting on    9
27   10   to the left of   11
28   11       sitting on    4
29   11   to the left of   12
30   11  to the right of   10
31   11   to the left of    1
32   11   to the left of    0
33   11       sitting on    9
34   12  to the right of   11
35   12   to the left of    3
36   13  to the right of    4
37   13   to the left of    7
38   13               on    9
39   13         lying on    9
40   13       sitting on    9