Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The usage of Stromgren photometry in studies of Local Group Dwarf
  Spheroidal Galaxies - Application to Draco: a new catalogue of Draco members
  and a study of the metallicity distribution function and radial gradients
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg