{
  "v": 1,
  "requestId": "a5b610eb-599c-4b96-98d1-c755b0191582",
  "chainId": 1,
  "window": {
    "toBlock": 26049165,
    "fromBlock": 26048866,
    "toBlockHash": "0x20426a3e4b845b87cd43d6683e11e5637765c8319cd7126a02222ae16a8c65cd"
  },
  "answerType": "uint256",
  "answer": "15050000",
  "figure": "15050000",
  "definitions": {
    "answer": "Block number as a decimal string, matching the requested numeric value.",
    "source": "The Ethereum Foundation Gray Glacier Upgrade Announcement is the reputable public source actually read; it states the upgrade was scheduled at block 15,050,000.",
    "missing": "The fact is established by the cited source; it is not missing.",
    "subject": "This is Ethereum protocol history; chain 1 and the pinned window timestamp the request and do not define the historical answer."
  },
  "recipe": {
    "kind": "panel",
    "source": "https://blog.ethereum.org/2022/06/16/gray-glacier-announcement"
  },
  "notes": "Read the Ethereum Foundation's Gray Glacier Upgrade Announcement, posted June 16, 2022. It states the scheduled network upgrade block as 15,050,000. The panel recipe records this off-chain historical source; the pinned range is copied exactly and does not determine the historical fact."
}