{
  "x-provenance": {
    "generated": "2026-08-19",
    "method": "probed",
    "source": "Live response to POST https://dataservice.kuleuven.be/pg/_search with body {\"query\":{\"bogus_query\":{}}} on 2026-08-19. Captured verbatim.",
    "status": 400
  },
  "response": {
    "error": {
      "root_cause": [
        {
          "type": "parsing_exception",
          "reason": "unknown query [bogus_query]",
          "line": 1,
          "col": 25
        }
      ],
      "type": "parsing_exception",
      "reason": "unknown query [bogus_query]",
      "line": 1,
      "col": 25,
      "caused_by": {
        "type": "named_object_not_found_exception",
        "reason": "[1:25] unknown field [bogus_query]"
      }
    },
    "status": 400
  }
}