Which side is the curtain on, the right or the left?
The curtain is on the right of the image.
    src        edge_attr  dst
0     0   to the left of   20
1     0   to the left of   19
2     1   to the left of   15
3     1   to the left of    2
4     1   to the left of   23
5     1   to the left of   18
6     1   to the left of    9
7     2  to the right of    1
8     2  to the right of    8
9     2   to the left of   18
10    2  to the right of   21
11    5   to the left of   19
12    5   to the left of   20
13    6   to the left of   22
14    6  to the right of   17
15    7   to the left of   18
16    8   to the left of    2
17    8   to the left of   18
18    8  to the right of   21
19    9   to the left of   23
20    9           behind   15
21    9  to the right of   22
22    9  to the right of    1
23   11   to the left of   13
24   12   to the left of   14
25   13  to the right of   11
26   14  to the right of   12
27   15   to the left of   23
28   15  to the right of    1
29   15      in front of    9
30   16   to the left of   18
31   16  to the right of   20
32   16  to the right of   19
33   17               on    0
34   17   to the left of    6
35   18  to the right of   16
36   18  to the right of    7
37   18  to the right of    1
38   18  to the right of   21
39   18  to the right of    8
40   18  to the right of    2
41   19  to the right of    5
42   19   to the left of   16
43   19  to the right of    0
44   20  to the right of    0
45   20  to the right of    5
46   20   to the left of   16
47   21   to the left of    8
48   21   to the left of   18
49   21   to the left of    2
50   22   to the left of    9
51   22  to the right of    6
52   22   to the left of   23
53   23  to the right of    1
54   23  to the right of    9
55   23  to the right of   15
56   23  to the right of   22
57   23             with    9