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