{
  "@context" : "http://ids-mannheim.de/ns/KorAP/json-ld/v0.2/context.jsonld",
  "errors" : [ ],
  "warnings" : [ ],
  "announcements" : [ ],
  "collection" : {
    "@type" : "koral:docGroup",
    "operation" : "operation:or",
    "operands" : [ {
      "@type" : "koral:doc",
      "key" : "pubDate",
      "type" : "type:date",
      "value" : "1990",
      "match" : "match:geq"
    }, {
      "@type" : "koral:doc",
      "key" : "title",
      "type" : "type:string",
      "value" : "Mannheim",
      "match" : "match:eq"
    } ]
  }
}