{
    "facets": [ 
        {
            "field": "techniques",
            "terms": { 
            }
        },
        {
            "field": "yarncolor",
            "terms": { 
            }
        },
        {
            "field": "yarnweight",
            "terms": { 
                "aran": 3,
                "cobweb": 1,
                "dk": 2,
                "sock": 8,
                "worsted": 2
            }
        }
        
    ]
}