Searching for the file typically leads you to datasets used in natural language processing (NLP) and information retrieval research. Specifically, this file is part of the NTCIR-13 (NII Test Collection for IR Systems) , a series of evaluation workshops designed to enhance information access technologies.
Particularly the QA Lab tasks which focus on university entrance exam questions.
The National Institute of Informatics (NII) in Japan manages these collections. You can find the specific NTCIR-13 data page on their IDR (Informatics Data Repository) site.
