What is on the building behind the trees?
The clock is on the building.
    src        edge_attr  dst
0     0   to the left of    2
1     0   to the left of    3
2     0   to the left of    1
3     0   to the left of    5
4     0   to the left of   12
5     0   to the left of   16
6     0   to the left of   15
7     0   to the left of   18
8     0   to the left of    7
9     0   to the left of    4
10    1   to the left of    9
11    1  to the right of    0
12    2  to the right of    0
13    2  to the right of    7
14    2   to the left of   17
15    2  to the right of   18
16    2   to the left of    9
17    3               in    5
18    3  to the right of    0
19    4  to the right of    0
20    4  to the right of   18
21    5  to the right of    0
22    6   to the left of   10
23    6  to the right of   13
24    6  to the right of   15
25    7        on top of   18
26    7   to the left of    2
27    7  to the right of    0
28    8  to the right of   15
29    8      in front of    9
30    9  to the right of   13
31    9           behind    8
32    9  to the right of   15
33    9  to the right of   17
34    9  to the right of    2
35    9  to the right of    1
36    9  to the right of   11
37   10  to the right of    6
38   10               on    9
39   11   to the left of    9
40   11  to the right of   16
41   12  to the right of    0
42   13   to the left of    6
43   13   to the left of    9
44   13  to the right of   14
45   13  to the right of   16
46   14   to the left of   13
47   15  to the right of    0
48   15   to the left of    9
49   15   to the left of    8
50   15   to the left of    6
51   16  to the right of    0
52   16   to the left of   13
53   16     hanging from   14
54   16   to the left of   11
55   17   to the left of    9
56   17  to the right of    2
57   18  to the right of    0
58   18   to the left of    2
59   18   to the left of    4