Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 5 Poster Contributions in the MPA/ESO Conference "Evolution of
  large-scale structure", Garching, August 1998   Poster Titles:
  (1) Optical to IRAS galaxy bias factors using the Local Group Dipole
  (2) The X-ray Luminosity Function of Local Galaxies
  (3) The ROSAT X-ray Background Dipole
  (4) The Angular Correlation Function of RASS Extragalactic Sources
  (5) Galaxy Cluster Shapes

7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio