KSU Team’s QA System for World History Exams at the NTCIR-13 QA Lab-3 Task

This paper describes the systems and results of the team KSU for QA Lab-3 task in NTCIR-13. We have been developing question answering systems for the world history multiple-choice questions in the National Center Test for University Admissions. We newly developed automatic answering systems for the world history questions in the secondstage exams of Japanese entrance examinations consisting of the term questions and the essay questions. In the multiplechoice question subtask, we improved on automatic answering systems in QA Lab-2 by implementing query generation methods in accordance with the answer types. In the term question subtask, we designed systems that focus on the category prediction using word prediction models and the evaluation score based on the graph of dependency relations. In the essay question subtask, we proposed automatic answering methods that combines the document retrieval depending on the instructions of how the essay should be summarized, and the knowledge sources constructed from various simple sentences.