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