What size does the nut in the middle of the picture have?
The nut has large size.
    src        edge_attr  dst
0     2   to the left of    8
1     3  to the right of   13
2     3  to the right of   12
3     3   to the left of   16
4     3  to the right of   19
5     3  to the right of    6
6     4   to the left of   16
7     5  to the right of   20
8     5  to the right of   10
9     5   to the left of    7
10    5   to the left of   14
11    5  to the right of   21
12    5   to the left of   17
13    5   to the left of   22
14    6   to the left of   16
15    6   to the left of    3
16    7  to the right of    9
17    7   to the left of    8
18    7  to the right of    5
19    8  to the right of   22
20    8  to the right of    7
21    8  to the right of    2
22    8  to the right of   17
23    9   to the left of    7
24   10               at   21
25   10   to the left of    5
26   12   to the left of    3
27   12   to the left of   16
28   13   to the left of    3
29   13   to the left of   19
30   13   to the left of   16
31   14  to the right of    5
32   16  to the right of    3
33   16  to the right of   13
34   16  to the right of   19
35   16  to the right of    6
36   16  to the right of   12
37   16  to the right of    4
38   17   to the left of    8
39   17  to the right of    5
40   17  to the right of   21
41   19   to the left of   16
42   19   to the left of    3
43   19  to the right of   13
44   20   to the left of    5
45   21   to the left of    5
46   21   to the left of   22
47   21   to the left of   17
48   22  to the right of   21
49   22   to the left of    8
50   22  to the right of    5