What sign is that arrow on?
The arrow is on the traffic sign.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    3
2     2  to the right of    7
3     2  to the right of    6
4     2  to the right of    3
5     3   to the left of    7
6     3   to the left of    0
7     3   to the left of    6
8     3   to the left of    2
9     4   to the left of    5
10    5   to the left of    0
11    5  to the right of    4
12    5   to the left of    9
13    5               in    1
14    6   to the left of    8
15    6   to the left of    2
16    6  to the right of    3
17    7   to the left of    2
18    7               on    6
19    7  to the right of    3
20    8  to the right of    6
21    8               on    2
22    9  to the right of    5