What are the trees around of?
The trees are around the parking lot.
    src        edge_attr  dst
0     0  to the right of    2
1     0   to the left of    1
2     0   to the left of    4
3     1  to the right of    0
4     1  to the right of    5
5     1  to the right of    4
6     1  to the right of   11
7     2   to the left of    5
8     2   to the left of    4
9     2  to the right of   10
10    2   to the left of    6
11    2   to the left of   11
12    2   to the left of    0
13    3           around   14
14    3            below   12
15    4  to the right of    6
16    4  to the right of    5
17    4  to the right of    0
18    4  to the right of    2
19    4   to the left of    1
20    5               of    1
21    5   to the left of    1
22    5   to the left of    4
23    5  to the right of    6
24    5  to the right of    2
25    6  to the right of    2
26    6   to the left of    4
27    6   to the left of    5
28    7  to the right of   10
29    7   to the left of    8
30    8  to the right of    7
31    8   to the left of    9
32    9               of    8
33    9  to the right of    8
34   10   to the left of    7
35   10   to the left of    2
36   11               of    1
37   11  to the right of    2
38   11   to the left of    1