Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Common Evaluation Setting for Just.Ask, Open Ephyra and Aranea QA
  systems   Question Answering (QA) is not a new research field in Natural Language
Processing (NLP). However in recent years, QA has been a subject of growing
study. Nowadays, most of the QA systems have a similar pipelined architecture
and each system use a set of unique techniques to accomplish its state of the
art results. However, many things are not clear in the QA processing. It is not
clear the extend of the impact of tasks performed in earlier stages in
following stages of the pipelining process. It is not clear, if techniques used
in a QA system can be used in another QA system to improve its results. And
finally, it is not clear in what setting should be these systems tested in
order to properly analyze their results.

26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th