How big is the sidewalk?
The sidewalk is small.
   src        edge_attr  dst
0    0  to the right of    4
1    1  to the right of    4
2    2   to the left of    4
3    3   to the left of    4
4    4   to the left of    1
5    4   to the left of    0
6    4  to the right of    3
7    4  to the right of    2
8    4   to the left of    5
9    5  to the right of    4