column_mapping = {
    'num-of-cylinders': {
        'one': 1,
        'two': 2,
        'three': 3,
        'four': 4,
        'five': 5,
        'six': 6,
        'seven': 7,
        'eight': 8,
        'nine': 9,
        'ten': 10,
        'eleven': 11,
        'twelve': 12
    },
    'aspiration': {
        'std': 0,
        'turbo': 1
    }
}
