def combine_address_row(row):
    """ Combines street addresses on a row level
    Args:
        one row that contains variables "Street Prefix", "Street Number",
            "Street Name", "Street Suffix"
    Returns:
        str with one combined address
    """
    if row['Street Prefix'] == "":
        ans = row['Street Number'] + ' ' + row['Street Name'] + ' ' + row['Street Suffix']
    else:
        ans = row['Street Number'] + ' ' + row['Street Prefix'] + ' ' + \
        row['Street Name'] + ' ' + row['Street Suffix']
    return ans.strip()