"dataset": { "Brown": [ {"name": "Black", "value": 32 }, {"name": "Brown", "value": 53 }, {"name": "Red","value": 10}, {"name": "Blond", "value": 3} ], "Blue": [ {"name": "Black", "value": 11 }, {"name": "Brown", "value": 50 }, {"name": "Red","value": 10}, {"name": "Blond", "value": 30} ], ... }