Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: Infrared properties of $\theta$-type ET charge-transfer salts:
  $\theta$-ET$_2$CsZn(SCN)$_4$ vs $\theta$-ET$_2$RbZn(SCN)$_4$
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an