[
    {
        "min_names": 5,
        "max_names": 15,
        "min_length": 3,
        "max_length": 15,
        "valid_ratio": 0.3
    },
    {
        "min_names": 1,
        "max_names": 5,
        "min_length": 1,
        "max_length": 5,
        "valid_ratio": 0.7
    },
    {
        "min_names": 3,
        "max_names": 10,
        "min_length": 1,
        "max_length": 10,
        "valid_ratio": 0.5
    }
]