def METHOD_NAME(opt):
    dpath = os.path.join(opt['datapath'], 'NarrativeQA')
    version = None
    if not build_data.built(dpath, version_string=version):
        print('[building data: ' + dpath + ']')
        if build_data.built(dpath):
            # an older version exists, so remove these outdated files.
            build_data.remove_dir(dpath)
        build_data.make_dir(dpath)
        # Download the data.
        for downloadable_file in RESOURCES:
            downloadable_file.download_file(dpath)
        print('downloading stories now')
        base_path = os.path.join(dpath, 'narrativeqa-master')
        download_stories(base_path)
        # move from tmp to stories
        tmp_stories_path = os.path.join(base_path, 'tmp')
        new_stories_path = os.path.join(base_path, 'stories')
        shutil.move(tmp_stories_path, new_stories_path)
        # divide into train, valid and test for summaries
        summaries_csv_path = os.path.join(
            base_path, 'third_party', 'wikipedia', 'summaries.csv'
        )
        new_path = os.path.join(base_path, 'summaries.csv')
        shutil.move(summaries_csv_path, new_path)
        divide_csv_into_sets(new_path)
        # divide into sets for questions
        questions_path = os.path.join(base_path, 'qaps.csv')
        divide_csv_into_sets(questions_path)
        # divide into sets for documents
        documents_path = os.path.join(base_path, 'documents.csv')
        divide_csv_into_sets(documents_path)
        # move specific set's files into their set's folder
        make_folders(base_path)
        move_files(base_path)
        # move narrativeqa-master to narrative_qa
        new_path = os.path.join(dpath, 'narrative_qa')
        shutil.move(base_path, new_path)
        # mark the data as built
        build_data.mark_done(dpath, version_string=version)