premise: The Mildenhall Treasure is a large hoard of masterpieces of Roman silver tableware from the 4th century AD, and by far the most valuable Roman objects artistically and by weight of bullion in Britain. It was found at West Row, near Mildenhall, Suffolk. It consists of over thirty items and includes the Great Dish weighing over 8kg alone.
hypothesis: The Great Dish weighs half of the entire Mildenhall Treasure. 
reason: The article doesn't state how much the entire treasure weighs. 