QALab PoliInfo2

In NTCIR15 QA Lab-PoliInfo2, we propose three tasks (Stance Classification task, Dialog Summarization task and Entity Linking task ) to solve political issues by natural language processing.


Stance classification task

Stance classification task aims at estimating politician's position from politician's utterances. In PoliInfo2, system participating in the task estimates the stances of political parties from the utterances of the members of the Tokyo Metropolitan Assembly. Given the Tokyo Metropolitan Assembly, topics (agenda), member's list and political denomination list, and the systems classify their stance into two categories (agree or disagree) for each agenda.

Dialog summarization task

Dialog summarization task aims at summarizing the transcript of local assembly, taking the structure of dialogue into account. In PoliInfo2, systems participating in this task summarize the transcript based on the dialogue structure, which consists of “Members' questions” and “Governor's answer”. Given the transcript and summary conditions (speaker name and number of summary characters etc), they generate the structured document.

Entity linking task

Entity linking task aims at identifying political terms included in politicians' statements, and is to resolve mention recognition, disambiguation and linking the mention with the knowledge base. In PoliInfo2, Entity linking is the task of assigning a unique identity of "legal name" which is one of the political terms. Given local assembly member's utterances, and systems extract a mention of “law name” and link the mention with the list of law names or Wikipedia.


Sep 30th 2019: NTCIR-15 Kickoff Event in NII, Tokyo
Oct 18th 2019: First Round Table Meeting in NII, Tokyo
Dec 10th 2019: Second Round Table Meeting in NII, Tokyo
Dec 15th 2019: Registration Start
Feb 15th 2020: Dataset Release *
Mar 16th 2020: Third round table meeting in NLP2020
Apr 30th 2019: Task Registration Due
May 7th 2020: Dry Run*
Jun 30th 2020: Submission Deadline for Dry Run
Jun 1st-12th 2020: Update of dataset
Jul 13th 2020: Formal Run
Jul 31st 2020: Submission Deadline for Formal Run
Aug 1st – 7th 2020: Evaluation by participants
Aug 8th – 14th 2020: Evaluation by organizers
Aug 15th 2020: Evaluation Result Release
Aug 2020: Fourth Round Table Meeting()
Sep 1st 2020: Task over view paper release (draft)
Sep 2020: Submission deadline of participant papers (draft)
Nov 1st 2020: Camera-read participant paper submission deadline
Dec 5th-8th 2020: NTCIR-15 Conference & EVIA 2020 in NII, Tokyo



Hideyuki Shibuki
National Institute of Informatics, Japan
Yasuhiro Ogawa
Nagoya University
Akiba Tomoyoshi
Toyohashi University of Technology
Yoshioka Masaharu
Hokkaido University
Teruko Mitamura
Carnegie Mellon University, USA
Madoka Ishioroshi
National Institute of Informatics, Japan
Keiichi Takamaru
Utsunomiya Kyowa University, Japan
Yuzu Uchida
Hokkai-Gakuen University, Japan
Hokuto Ototake
Fukuoka University, Japan
Yasutomo Kimura
Otaru University of Commerce, Japan and RIKEN, Japan
Sasaki Minoru
Ibaraki University


Satoshi Sekine
Noriko Kando
National Institute of Informatics
Tatsunori Mori
YOKOHAMA National University
Kenji Araki
Hokkaido University