Which color is the sidewalk made of cement?
The sidewalk is gray.
    src        edge_attr  dst
0     0  to the right of    7
1     2  to the right of    7
2     3   to the left of   10
3     4  to the right of    7
4     6   to the left of   12
..  ...              ...  ...
62   25  to the right of   12
63   25  to the right of   19
64   25  to the right of   22
65   26   on the side of   12
66   26  to the right of   14

[67 rows x 3 columns]