if not io.check_file_existence(self.data_folder, inputs_file):
                # Even worst - we have to download wily.
                url = "https://zenodo.org/record/841984/files/wili-2018.zip?download=1"
                zipfile_name = "wili-2018.zip"
                io.download_extract_zip_file(self.logger, self.data_folder, url, zipfile_name)