Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Matters of Gravity, The Newsletter of the Topical Group on Gravitation
  of the American Physical Society, Volume 35, Winter 2010   GGR News:
  - GGR Program at the APS meeting in Washington D.C., by David Garfinkle
  - we hear that..., by David Garfinkle
  Research Briefs:
  - Supernovae modelling, by Ian Hawke
  Conference Reports:
  - ADM-50, by Richard Woodard

9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ