{"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":"32dd4f9e748b9106467e297cb1e5e387af3abe24a2de314dc9352f27fb5812a4"}