Is the sidewalk made of the same material as the mailbox?
No, the sidewalk is made of concrete and the mailbox is made of wood.
    src        edge_attr  dst
0     0   to the left of   19
1     1   to the left of   10
2     1  to the right of    7
3     1   to the left of   19
4     1  to the right of   13
..  ...              ...  ...
58   19   to the left of   11
59   19  to the right of    9
60   19  to the right of   13
61   19  to the right of   14
62   19   to the left of   18

[63 rows x 3 columns]