What is the patio made of?
The patio is made of brick.
   src        edge_attr  dst
0    0             near   14
1    1               in    5
2    1   to the left of    9
3    3   to the left of    4
4    4  to the right of    3
5    9  to the right of    1
6   12             near   14
7   13               of    0
8   14             near   12
9   14             near    0