{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the main technical challenges in blockchain?","a":"The  main technical challenges in blockchain include:"}]}],"pr":"cd6ef25c10f8fa6eacce87072cb350ff16cb2aaac64c25c13d7b40f5eac70abd"}