anchor.diff:      locationCities: [String]
       majorPeriods: [String]
       marketable: Boolean
  +    marketingCollectionID: String
       materialsTerms: [String]
       medium: String
       offerable: Boolean
  
positive.code: 
    # When true, will only return `marketable` works (not nude or provocative).
    marketable: Boolean
    materialsTerms: [String]
  
    # A string from the list of allocations, or * to denote all mediums
  
negative.code: 
      # When true, will only return `marketable` works (not nude or provocative).
      marketable: Boolean
      marketingCollectionID: String
      materialsTerms: [String]
  
      # A string from the list of allocations, or * to denote all mediums
  