What's the street made of?
The street is made of brick.
    src        edge_attr  dst
0     0      in front of    7
1     0  to the right of    7
2     0  to the right of   10
3     4   to the left of    9
4     4   to the left of   20
5     5  to the right of    7
6     6   to the left of    8
7     6   to the left of   11
8     6   to the left of   13
9     7   to the left of    5
10    7             near   11
11    7        parked on   17
12    7           behind    0
13    7   to the left of    0
14    8  to the right of    6
15    8  to the right of   18
16    9  to the right of    4
17    9  to the right of   21
18   10   to the left of    0
19   11          next to    7
20   11  to the right of   18
21   11  to the right of    6
22   12   to the left of   15
23   12   to the left of   14
24   12   to the left of   16
25   13  to the right of    6
26   13  to the right of   18
27   14  to the right of   12
28   14  to the right of   15
29   14   to the left of   19
30   14  to the right of   16
31   15   to the left of   16
32   15   to the left of   14
33   15  to the right of   12
34   16   to the left of   14
35   16  to the right of   12
36   16  to the right of   15
37   18   to the left of   19
38   18   to the left of   11
39   18   to the left of   13
40   18   to the left of    8
41   19      standing on    7
42   19  to the right of   18
43   19  to the right of   14
44   20  to the right of    4
45   21   to the left of    9