{"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":"26f2ffa73d060461d1bef2995b90b2bfe1ef35ead8f32772458f9980e1d63203"}