{"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":"1565de614a25c32e23d2c6f95fae1f53eacba1f4d148e26e00b6abe49c8d4a96"}