To solve this, you’ll need to

• work out how to query for all directors - what have directors done that make them directors?
• find the most recent release date for each director
• sort the results by the most recent release
• return the directors name, and the details of the most recent release
• you’ll need one query to get the directors and their latest movies, and another query to sort this to get most recent movies first
• for something extra, try using since to work out how many days since the movie was released (or how many days till release, for some)

{
  # Get all directors
  var(func: has(director.film)) @cascade {
    director.film {
      date as initial_release_date
    }
    # Store maxDate as a variable
    maxDate as max(val(date))
    daysSince as math(since(maxDate)/(24*60*60))
  }

  # Order by maxDate
  me(func: uid(maxDate), orderdesc: val(maxDate), first: 10) {
    [email protected]
    days : val(daysSince)

    # For each director, sort by release date and get latest movie.
    director.film(orderdesc: initial_release_date, first: 1) {
      [email protected]
      initial_release_date
    }
  }
}