[1] Natural Language Processing Systems Development Project, Promotion Project 1, NTT Media Intelligence Laboratories, Japan
[2] Promotion Project 1, NTT Media Intelligence Laboratories, Japan
[3] NTT Communication Science Laboratories, Japan
[4] Recognition Research Group, Media Information Laboratory, NTT Communication Science Laboratories, Japan
[5] Media Recognition Research Group, NTT Communication Science Laboratories, Japan
[6] 2020 Epoch-making Project, NTT Service Evolution Laboratories, Japan