Article Schema
Add date_previously_modified to the Article object so data consumers can determine amount of time that have passed since last update.

Notes:

• this will require either an API call to actions API to get previous revision or caching date_modified value of the previous article version

Schema:

{
  "name": "Earth",
  "date_previously_modified": "2021-11-30T09:14:29Z",
  // ...other stuff goes here...
}