Is the sidewalk below the step made of stone or cobblestone?
The side walk is made of stone.
    src        edge_attr  dst
0     0  to the right of   17
1     0             near    3
2     0  to the right of   10
3     0               on    4
4     0          next to    3
..  ...              ...  ...
73   23  to the right of    9
74   24  to the right of    2
75   24               on    4
76   25   to the left of    9
77   26               on   26

[78 rows x 3 columns]