Which material was used to make the street, brick or cobblestone?
The street is made of brick.
    src        edge_attr  dst
0     0   to the left of   10
1     1  to the right of   11
2     1  to the right of   14
3     3   to the left of   10
4     4  to the right of   10
5     5  to the right of   10
6     6   to the left of   10
7     6   to the left of   11
8     6   to the left of   14
9     8   to the left of   10
10    8   to the left of   12
11   10               in    2
12   10  to the right of    0
13   10  to the right of    8
14   10   to the left of    4
15   10  to the right of    3
16   10  to the right of    6
17   10   to the left of    5
18   10             with   14
19   11  to the right of    6
20   11   to the left of    1
21   11  to the right of   14
22   12  to the right of    8
23   14   to the left of    1
24   14  to the right of    6
25   14   to the left of   11