Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Nature of Hidden Broad Line Regions in Seyfert 2 Galaxies   We consider the sample of Tran (2001) to study the X-ray properties of
Seyfert 2 galaxies with and without polarized broad lines.

11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph