What's located on top of the tower?
The roof is on top of the tower.
    src        edge_attr  dst
0     0  to the right of    6
1     1  to the right of    7
2     1   on the side of   11
3     1  to the right of    2
4     2   to the left of    9
5     2   to the left of    4
6     2   to the left of    5
7     2   to the left of   10
8     2   to the left of    6
9     2   to the left of    8
10    2   to the left of   12
11    2   to the left of    1
12    3  to the right of    7
13    3        on top of    1
14    3            above    8
15    4  to the right of    2
16    4  to the right of    9
17    4        on top of    5
18    5  to the right of    9
19    5  to the right of   10
20    5  to the right of    2
21    5       hanging on   11
22    5     hanging from   10
23    5     covered with    4
24    6  to the right of    2
25    6   to the left of    0
26    7   to the left of    3
27    7   to the left of    1
28    8            above   10
29    8            above   12
30    8  to the right of    2
31    8   on the side of    1
32    9   to the left of    4
33    9  to the right of    2
34    9   to the left of   12
35    9   to the left of    5
36   10            below    8
37   10   to the left of    5
38   10   to the left of   12
39   10  to the right of    2
40   10   on the side of   11
41   12  to the right of    2
42   12  to the right of   10
43   12  to the right of    9
44   12            below    8