Which material was used to make the lamp that is not short, metal or wood?
The lamp is made of metal.
   src edge_attr  dst
0    0      near    0
1    0      near    4
2    0      near    2
3    1      near    4
4    2      near    0
5    3        on    4
6    4      near    1
7    4      near    0
8    5        on    4
9    5        in    4