Is the floor made of concrete?
Yes, the floor is made of concrete.
   src          edge_attr  dst
0    3     to the left of    6
1    4     to the left of   12
2    6     to the left of   12
3    6    to the right of    3
4    9  sitting on top of    5
5   12    to the right of    4
6   12    to the right of    6