Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Introduction to the CoNLL-2002 Shared Task: Language-Independent Named
  Entity Recognition   We describe the CoNLL-2002 shared task: language-independent named entity
recognition. We give background information on the data sets and the evaluation
method, present a general overview of the systems that have taken part in the
task and discuss their performance.

12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th