[{
    "name": "Lisa",
    "age": 22,
    "group": "group1"
}, {
    "name": "Lucy",
    "age": 21,
    "group": "group1"
}, {
    "name": "Malora",
    "age": 25,
    "group": "group2"
}, {
    "name": "Bart",
    "age": 25,
    "group": "group3"
}, {
    "name": "Homer",
    "age": 28,
    "group": "group2"
}, {
    "name": "Marge",
    "age": 21,
    "group": "group2"
}]