Where is the tree?
The tree is on the sidewalk.
    src        edge_attr  dst
0     1  to the right of    3
1     1  to the right of    8
2     1  to the right of   12
3     1  to the right of    2
4     1  to the right of    6
5     1  to the right of    4
6     2   to the left of    1
7     3   to the left of    6
8     3   to the left of    1
9     4   to the left of    1
10    5   to the left of    7
11    6  to the right of    9
12    6   to the left of    1
13    6  to the right of    3
14    6  to the right of    8
15    7  to the right of   11
16    7               on    9
17    7  to the right of    5
18    8         crossing    0
19    8  to the right of    9
20    8   to the left of    6
21    8   to the left of    1
22    9   to the left of    6
23    9   to the left of   12
24    9   to the left of    8
25   11               on    5
26   11   to the left of    7
27   12         crossing    0
28   12  to the right of    9
29   12   to the left of    1