{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The steps for detecting duplicates in chain-based data are as follows:","a":"Feature extraction: Extract representative features  from the preprocessed data, such as the hash value, timestamp, and participating parties of the data. These features..."}]}],"pr":"5da11ed4bd108e5f7d4387f61c2b2359f361ab241b8efd2a287a6f0ef46a486e"}