What does the backpack hang on?
The backpack hangs on the chair.
    src        edge_attr  dst
0     0   to the left of    2
1     0  to the right of    7
2     0   to the left of    9
3     0   to the left of   15
4     0   to the left of    5
5     0   to the left of    4
6     1  to the right of   10
7     1   to the left of   16
8     2       hanging on   15
9     2     hanging from   15
10    2   to the left of    4
11    2   to the left of   16
12    2   to the left of    8
13    2  to the right of    0
14    4   to the left of    8
15    4  to the right of    2
16    4  to the right of    9
17    4   to the left of   16
18    4  to the right of    0
19    5  to the right of    0
20    5   to the left of   16
21    6  to the right of   11
22    7   to the left of   17
23    7   to the left of    0
24    8  to the right of    4
25    8  to the right of    2
26    8  to the right of    9
27    9  to the right of   10
28    9   to the left of    8
29    9   to the left of   16
30    9   to the left of    4
31    9  to the right of    0
32   10   to the left of    9
33   10   to the left of   11
34   10   to the left of    1
35   11  to the right of   10
36   11   to the left of    6
37   11   to the left of   16
38   11               on    1
39   15  to the right of    0
40   15        on top of    9
41   15   to the left of   16
42   16  to the right of    4
43   16  to the right of    2
44   16  to the right of   15
45   16  to the right of   11
46   16  to the right of    5
47   16  to the right of    9
48   16  to the right of    1
49   17  to the right of    7
50   17   to the left of   18
51   18  to the right of   17
52   19               on    0