Are the trees behind a fence?
No, the trees are behind a car.
    src        edge_attr  dst
0     0   to the left of    9
1     0               on    4
2     1  to the right of   12
3     2      in front of    8
4     3  to the right of    5
5     3  to the right of    8
6     4   to the left of    9
7     5   to the left of   13
8     5   to the left of   10
9     5   to the left of    6
10    5   to the left of    3
11    5   to the left of   16
12    6  to the right of    5
13    6   to the left of   15
14    8   to the left of    3
15    8           behind    2
16    9  to the right of    0
17    9  to the right of    4
18   10   to the left of   15
19   10  to the right of    5
20   11  to the right of   12
21   12   to the left of   11
22   12   to the left of    1
23   13  to the right of    5
24   13   to the left of   15
25   15  to the right of   13
26   15  to the right of    6
27   15  to the right of   16
28   15  to the right of   10
29   16   to the left of   15
30   16          holding    3
31   16  to the right of    5