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