What kind of sign is the number on?
The number is on the street sign.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of   14
2     0  to the right of   12
3     0  to the right of    2
4     0  to the right of   16
5     0   to the left of    5
6     0   to the left of    3
7     2   to the left of    5
8     2   to the left of   16
9     2   to the left of    0
10    2   to the left of   10
11    2   to the left of   14
12    3               on   14
13    3  to the right of    0
14    4   to the left of    8
15    4   to the left of   17
16    5               on   14
17    5  to the right of    2
18    5  to the right of    0
19    8  to the right of    4
20   10               on   14
21   10  to the right of    0
22   10  to the right of    2
23   12   to the left of   16
24   12   to the left of   14
25   12   to the left of    0
26   13  to the right of   18
27   14     hanging from   15
28   14  to the right of   12
29   14  to the right of    0
30   14  to the right of   16
31   14  to the right of    2
32   16  to the right of    2
33   16   to the left of   14
34   16  to the right of   12
35   16   to the left of    0
36   17  to the right of    4
37   18   to the left of   13