sample-preference.json

{
"alice":
    {
        "gender":
            {
                "male":   9,
                "female": 1
            },
        "age":
            {
                "20-24":  3,
                "25-29":  6,
                "30-34":  1,
                "35-39":  0
            },
        "body":
            {
                "athletic":  5,
                "average":   4,
                "slim":      1,
                "overweight":0
            }
    },
"amy":
    {
        "gender":
            {
                "male":  20,
                "female": 0
            },
        "age":
            {
                "20-24":  0,
                "25-29":  5,
                "30-34": 10,
                "35-39":  5
            },
        "body":
            {
                "athletic":  18,
                "average":   2,
                "slim":      0,
                "overweight":0
            }
    },
"bob":
    {
        "gender":
            {
                "male":  5,
                "female": 95
            },
        "age":
            {
                "20-24":  70,
                "25-29":  20,
                "30-34":  10,
                "35-39":  0
            },
        "body":
            {
                "athletic":   0,
                "average":   30,
                "slim":      50,
                "overweight":20
            }
    },
"ben":
    {
        "gender":
            {
                "male":  0,
                "female":50
            },
        "age":
            {
                "20-24":  5,
                "25-29":  20,
                "30-34":  20,
                "35-39":  5
            },
        "body":
            {
                "athletic":   0,
                "average":   20,
                "slim":       5,
                "overweight":25
            }
    }
}