{"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":"Data preprocessing: Clean  and preprocess the obtained data, such as removing null values, abnormal values, and performing standardization and normalization operations on the data, to facilitate subsequent duplicate detection."}]}],"pr":"e8366f495333b1c4852150b5b45b76a3eb3ba354474e24e20f72d9c44a39ce83"}