Is the narrow street made of cobblestone?
Yes, the street is made of cobblestone.
    src        edge_attr  dst
0     0  to the right of   21
1     0  to the right of   18
2     1  to the right of    6
3     1  to the right of   21
4     2   to the left of    4
..  ...              ...  ...
66   21   to the left of    5
67   21   to the left of   12
68   21   to the left of   13
69   21   to the left of    0
70   21   to the left of   11

[71 rows x 3 columns]