Which kind of furniture are the glasses on?
The glasses are on the desk.
   src        edge_attr  dst
0    0               on    2
1    0  to the right of    3
2    1               on    2
3    3   to the left of    0
4    3   to the left of    6
5    3   to the left of    5
6    5  to the right of    3
7    6  to the right of    3
8    6               by    5