{
  "type": "object",
  "properties": {
    "winner": {
      "type": "string",
      "enum": ["A", "B"],
      "description": "Choose the response that correctly answers input.question. Return its key from input.responses.",
      "x-runtime": {
        "label_permutations": {"scope": "/input/responses"},
        "probabilities": "all"
      }
    }
  },
  "required": ["winner"],
  "additionalProperties": false
}