curl -H 'Content-Type: application/json' http://localhost:9200/origin-read/_search\?pretty -d '{
  "query": {
    "bool": {
      "must": [
        {
          "nested": {
            "path": "intrinsic_metadata",
            "query": {
              "bool": {
                "must": [
                  {
                    "exists": {
                      "field": "intrinsic_metadata.http://schema.org/programmingLanguage.@value"
                    }
                  }
                ]
              }
            }
          }
        }
      ]
    }
  },
  "size": 100,
  "from": 0,
  "_source": [
    "intrinsic_metadata.http://schema.org/programmingLanguage.@value",
    "url"
  ]
}'