{
  "id": "english_writing",
  "category": "English writing",
  "grader": "writing",
  "lang": "en",
  "max_tokens": 3000,
  "prompt": "Write one polished paragraph (150-220 words) in formal academic English for the introduction of a research report, explaining why municipal house price indices matter to policymakers. Use the expressions 'spatial heterogeneity', 'housing policy' and 'transaction-level data'. No title, no bullet list.",
  "must_contain": [
    "spatial heterogeneity",
    "housing policy",
    "transaction-level data"
  ],
  "words": [
    150,
    220
  ]
}