What is on the wall?
The clock is on the wall.
    src        edge_attr  dst
0     0   to the left of   11
1     0  to the right of   12
2     1   to the left of    3
3     1   to the left of   15
4     1   to the left of   16
5     1   to the left of    7
6     1   to the left of    5
7     3               on   17
8     3               on    4
9     3               on    8
10    3  to the right of    1
11    5  to the right of    1
12    7  to the right of    1
13    7  to the right of   14
14    7  to the right of   12
15    7  to the right of   13
16    9               on   10
17    9   to the left of   15
18   10   to the left of   15
19   10  to the right of   14
20   11  to the right of    0
21   11               on    7
22   12   to the left of    7
23   12   to the left of    0
24   13   to the left of    7
25   14   to the left of    7
26   14   to the left of   10
27   15  to the right of    1
28   15  to the right of   10
29   15  to the right of    9
30   16  to the right of    1