def _standardize_keys(zipcounty):
    """Standardize and keep relevent fields (zip and county)."""
    standard_area = {}
    for k, v in zipcounty.items():
        if k.replace(' ', '').lower() in ['zip', 'zipcode', 'zip code']:
            standard_area['zipCode'] = v
        if k.replace(' ', '').lower() in ['county', 'countyname', 'county name']:
            standard_area['countyName'] = v
    return standard_area