What kind of sign are the leaves behind of?
The leaves are behind the street sign.
    src        edge_attr  dst
0     0           behind    7
1     0           behind    1
2     0  to the right of    7
3     0           behind    2
4     1      in front of    0
5     1            above    7
6     1               on   10
7     2      in front of    0
8     2        on top of   10
9     2            above    7
10    2               on   10
11    3   to the left of    5
12    3  to the right of    4
13    3               on    7
14    3   to the left of    6
15    4               on    7
16    4   to the left of    5
17    4   to the left of    3
18    4   to the left of    6
19    5  to the right of    6
20    5  to the right of    4
21    5               on    7
22    5  to the right of    3
23    6  to the right of    3
24    6  to the right of    4
25    6   to the left of    5
26    6               on    7
27    7            under    1
28    7            under    2
29    7   to the left of    0
30    7      in front of    0
31    7               on   10
32    9               on    1
33    9  to the right of   10
34   10   to the left of    9
35   12               on    2