Are there both buses and fences in the picture?
Yes, there are both a bus and a fence.
    src        edge_attr  dst
0     0            above    3
1     1   to the left of    4
2     1   to the left of   20
3     1   to the left of   21
4     2   to the left of    3
5     3            below    0
6     3  to the right of    2
7     3   to the left of    8
8     3  to the right of   17
9     3   to the left of   16
10    3  to the right of   23
11    3  to the right of   22
12    4  to the right of    1
13    4   to the left of   21
14    4   to the left of   24
15    5        on top of    3
16    5   to the left of   25
17    6   to the left of   21
18    7   to the left of   15
19    7   to the left of   18
20    8  to the right of   26
21    8  to the right of    3
22    9   to the left of   25
23   11   to the left of   25
24   12  to the right of   21
25   14  to the right of   23
26   14   to the left of   26
27   15  to the right of    7
28   16  to the right of   18
29   16  to the right of    3
30   17   to the left of    3
31   18   to the left of   16
32   18  to the right of    7
33   20  to the right of   22
34   20  to the right of    1
35   21  to the right of    1
36   21  to the right of    6
37   21  to the right of    4
38   21   to the left of   12
39   21   to the left of   25
40   21  to the right of   22
41   22   to the left of    3
42   22   to the left of   21
43   22   to the left of   20
44   23   to the left of   14
45   23   to the left of    3
46   24  to the right of    4
47   25  to the right of   21
48   25  to the right of    9
49   25  to the right of    5
50   25  to the right of   11
51   26  to the right of   14
52   26   to the left of    8