How does the wet street look, red or black?
The street is black.
    src        edge_attr  dst
0     0  to the right of    9
1     0   to the left of    8
2     0  to the right of   10
3     2               by    4
4     2   to the left of    6
5     3  to the right of    5
6     3       driving on    4
7     5               on    4
8     5       driving on    4
9     5   to the left of    3
10    6  to the right of    2
11    8  to the right of    9
12    8  to the right of    0
13    8  to the right of   10
14    9   to the left of    0
15    9   to the left of    8
16   10   to the left of    0
17   10   to the left of    8
18   10               on    9