anchor.diff:    # Returns the associated Fair/Sale/Show
     context: ArtworkContext
     contextGrids: [ArtworkContextGrid]
  +
  +  # The currency code used to pay for the artwork
  +  costCurrencyCode: String
  +
  +  # The amount paid for the artwork, in cents
  +  costMinor: Int
     culturalMaker: String
     date: String
   
  
positive.code:   artistIds: [String]!
    category: String
    clientMutationId: String
    date: String
    depth: String
    height: String
  
negative.code:   artworkId: String!
    category: String
    clientMutationId: String
    costCurrencyCode: String
    costMinor: Int
    date: String
    depth: String
    height: String
  