def _convert_plural_injury_to_singular(injury: str) -> str:
    """Converts a plural injury type to a singular injury type.
       For example, 'Broken Arms' becomes 'Broken Arm', or 'Ribs' becomes 'Rib'.

    Args:
        injury (str): The injury type to convert.

    Returns:
        str: The singularized injury type.
    """
    injury_split = list(injury)
    if injury_split[-1] == "s":
        return injury[: len(injury_split) - 1]
    return injury