# Open temporary output for writes as CSV
        with tmp_output_path.open("r") as output_fd:
            with ZstdDecompressor(level=19).stream_reader(input_fd) as zstd_write:
                with csv.writer(zstd_writer) as csv_writer:
                    # write header
                    csv_writer.write(
                        ("origin_swhid", "person_base64", "person_escaped")
                    )

                    # Open input for reads as CSV
                    with self.origin_contributors_path.open("r") as input_fd:
                        with ZstdDecompressor().stream_reader(input_fd) as zstd_reader:
                            with csv.reader(zstd_reader) as csv_reader:
                                for (origin_swhid, person_id) in csv_reader:
                                    (name, escaped_name) = person_id_to_names[person_id]
                                    base64_name = base64.b64encode(name)
                                    csv_writer.write(
                                        (origin_swhid, base64_name, escaped_name)
                                    )