def answer_json_to_strings(answer: Dict[str, Any]) -> Tuple[Tuple[str, ...], str]:
    """
    Takes an answer JSON blob from the DROP data release and converts it into strings used for
    evaluation.
    """
    if "number" in answer and answer["number"]:
        return tuple([str(answer["number"])]), "number"
    elif "spans" in answer and answer["spans"]:
        return tuple(answer["spans"]), "span" if len(answer["spans"]) == 1 else "spans"
    elif "date" in answer:
        return tuple(["{0} {1} {2}".format(answer["date"]["day"],
                                           answer["date"]["month"],
                                           answer["date"]["year"])]), "date"
    else:
        raise ValueError(f"Answer type not found, should be one of number, spans or date at: {json.dumps(answer)}")