{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to prepare data for collection containers in a blockchain?","a":"Data cleaning and preprocessing: For the input  data, cleaning and preprocessing are required to eliminate errors, missing values, and abnormalities. This includes operations such as data format conversion and data normalization."}]}],"pr":"07ad9969fda11bb508602be9ea25928e56e8fab01851ce3428ec0cbe0e4c2ec3"}