What are the trees in front of?
The trees are in front of the house.
    src        edge_attr  dst
0     0   to the left of   14
1     0   to the left of    9
2     1   to the left of   11
3     1      in front of   13
4     2               on    8
5     2  to the right of    4
6     3   to the left of    8
7     4   to the left of    5
8     4   to the left of    2
9     4   to the left of   12
10    4  to the right of   11
11    4  to the right of   13
12    4               on   15
13    5  to the right of    4
14    6   to the left of   14
15    6   to the left of    9
16    7   to the left of    8
17    8  to the right of    3
18    8  to the right of    7
19    8  to the right of   14
20    9  to the right of    0
21    9  to the right of    6
22   10  to the right of   11
23   11   to the left of    4
24   11   to the left of   10
25   11  to the right of   13
26   11  to the right of    1
27   12  to the right of    4
28   13   to the left of   11
29   13           behind    1
30   13   to the left of    4
31   14   to the left of    8
32   14  to the right of    0
33   14  to the right of    6