What is the tower in front of?
The tower is in front of the roof.
    src        edge_attr  dst
0     0   to the left of    6
1     0  to the right of    7
2     1               on    8
3     1   to the left of    3
4     1   to the left of    9
5     2  to the right of    8
6     2  to the right of    6
7     2           behind    8
8     3               of    9
9     3  to the right of    1
10    4               on    8
11    6   to the left of    2
12    6               of    8
13    6  to the right of    7
14    6  to the right of    0
15    7               of    8
16    7   to the left of    0
17    7   to the left of    6
18    8             with    9
19    8      in front of    2
20    8   to the left of    2
21    9               on    8
22    9               in    8
23    9  to the right of    1