Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: AandP: Utilizing Prolog for converting between active sentence and
  passive sentence with three-steps conversion   I introduce a simple but efficient method to solve one of the critical
aspects of English grammar which is the relationship between active sentence
and passive sentence. In fact, an active sentence and its corresponding passive
sentence express the same meaning, but their structure is different. I utilized
Prolog [4] along with Definite Clause Grammars (DCG) [5] for doing the
conversion between active sentence and passive sentence. Some advanced
techniques were also used such as Extra Arguments, Extra Goals, Lexicon, etc. I
tried to solve a variety of cases of active and passive sentences such as 12
English tenses, modal verbs, negative form, etc. More details and my
contributions will be presented in the following sections. The source code is
available at https://github.com/tqtrunghnvn/ActiveAndPassive.

2
The categories of this paper are: math
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org