Google Structured Data Tool

Hi I am getting the following errors when i use the Google Structured Data Tool hatom-feed hatom-entry: entry-title: Hillsboro Beach Homes Error: Missing required field "updated". Error: Missing required hCard "author". entry-title: Hillsboro Beach Condominiums Error: Missing required field "updated". Error: Missing required hCard "author". entry-title: Please advise how to fix