{"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":"65d6c907c5b1191562c66e7cc1cca2481e4ed20a2f6d2f932174c614e8a78765"}