What's in front of the building?
The tree is in front of the building.
    src        edge_attr  dst
0     0        parked in    8
1     0      standing in    8
2     0  to the right of    3
3     0  to the right of    4
4     1  on the front of   12
5     1   to the left of   10
6     1   to the left of    9
7     1  to the right of    5
8     2            above   15
9     3   to the left of    5
10    3   to the left of   17
11    3  to the right of   16
12    3   to the left of    0
13    4   to the left of    0
14    4  on the front of    3
15    4   to the left of    5
16    4  to the right of    7
17    4   to the left of   17
18    5  to the right of   11
19    5   to the left of   17
20    5  to the right of    4
21    5   to the left of    1
22    5  to the right of    7
23    5  to the right of    3
24    6               in    2
25    6      floating in    2
26    7   to the left of    5
27    7   to the left of    4
28    8             near   15
29    8             near   12
30    9      in front of   12
31    9  to the right of    1
32   10  on the front of   12
33   10  to the right of    1
34   11      standing in    8
35   11   to the left of    5
36   11   to the left of   12
37   11      standing on    8
38   12          next to    8
39   12           behind    9
40   12  to the right of   11
41   13  on the front of    0
42   15          next to    8
43   16   to the left of    3
44   17  to the right of    4
45   17  to the right of    5
46   17  to the right of    3