VIETNAMESE QUESTION ANSWERING SEVERAL ATTEMPTS HAVE BEEN MADE TO...

2.2. Vietnamese question answering

Several attempts have been made to build Vietnamese QA systems. T r a n et al. [24]

describe an experimental Vietnamese QA system. By extracting information from the

WWW, their system can answer simple questions in the travel domain with high

accuracy. N g u y e n, N g u y e n and P h a m [21] present a prototype for an ontology-

based Vietnamese QA system. Their system works like a natural language interface

to a relational database. T r a n et al. [25] introduce another Vietnamese QA system

focusing on Who, Whom, and Whose questions, which require an answer as a person

name. T r a n et al. [26] introduce a learning-based approach for Vietnamese question

classification which utilizes two kinds of features bag-of-words and keywords

extracted from the Web. Some studies have been conducted to build a Vietnamese

QA system in the legal domain [2, 5]. While D u o n g and B a o-Q u o c [5] focus on

simple questions about provisions, processes, procedures, and sanctions in law on

enterprises, B a c h et al. [2] deal with questions about the transportation law. The

most recent work on this field is the one of L e-H o n g and B u i [15], which proposes

an end-to-end factoid QA system for Vietnamese. By combining both statistical

models and ontology-based methods, their system can answer a wide range of

questions with promising accuracy.

To the best of our knowledge, this is the first work on machine learning-based

Vietnamese question analysis as well as question answering in the education domain.