Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Observational Status of Ultrahigh Energy Cosmic Rays and their
  Possible Origin in Starburst-Like Galaxies   This paper presents a brief review of the current status of ultrahigh energy
cosmic ray observations and discusses nearby starburst-like galaxies as their
possible origin.

4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs