{
  "v": 1,
  "requestId": "008c7a5e-70f5-4f2b-b2e5-bde960c96fdb",
  "chainId": 1,
  "window": {
    "toBlock": 26049165,
    "fromBlock": 26048866,
    "toBlockHash": "0x20426a3e4b845b87cd43d6683e11e5637765c8319cd7126a02222ae16a8c65cd"
  },
  "answerType": "uint256",
  "answer": "2020",
  "definitions": {
    "answer": "The four-digit UTC calendar year of the Ethereum Beacon Chain's genesis, represented as a decimal uint256 string.",
    "source": "The fact was read at https://ethereum.org/roadmap/beacon-chain/; it states that the Beacon Chain shipped on December 1, 2020.",
    "subject": "This is Ethereum protocol history; the pinned chain-1 window timestamps the request and is not used to derive the historical date.",
    "missing": "The source establishes the genesis date, so no missing-fact handling is needed."
  },
  "recipe": {
    "kind": "panel",
    "source": "https://ethereum.org/roadmap/beacon-chain/"
  },
  "notes": "Read the official ethereum.org Beacon Chain page. It identifies the shipping/genesis date as December 1, 2020; applying the requested UTC calendar-year definition yields 2020. The declared window is copied exactly from the pinned request, as this is a panel-evidence historical fact."
}