Do you see both windows and buses?
No, there are windows but no buses.
    src        edge_attr  dst
0     1  to the right of   15
1     1  to the right of    8
2     1  to the right of    7
3     2   to the left of   11
4     2   to the left of   12
5     2   to the left of   19
6     2   to the left of    9
7     2   to the left of   17
8     2               of   18
9     3   to the left of   11
10    3   to the left of   12
11    4  to the right of   17
12    4  to the right of   18
13    4  to the right of   11
14    4  to the right of   12
15    5   to the left of   10
16    5  to the right of    9
17    5  to the right of   17
18    5  to the right of   11
19    5               by    4
20    6  to the right of    7
21    7   to the left of    1
22    7   to the left of    6
23    8  to the right of   15
24    8  to the right of   16
25    8               on    7
26    8   to the left of    1
27    9   to the left of    5
28    9  to the right of   17
29    9  to the right of   18
30    9  to the right of    2
31   10  to the right of    5
32   11  to the right of   18
33   11  to the right of    2
34   11   to the left of    5
35   11   to the left of    4
36   11  to the right of    3
37   12   to the left of    4
38   12  to the right of    2
39   12  to the right of    3
40   14               by   11
41   15   to the left of    1
42   15   to the left of    8
43   16   to the left of    8
44   17   to the left of    5
45   17  to the right of    2
46   17   to the left of    4
47   17  to the right of   18
48   17   to the left of    9
49   18   to the left of   11
50   18   to the left of    9
51   18   to the left of   17
52   18   to the left of   19
53   18   to the left of    4
54   19  to the right of   18
55   19  to the right of    2