Complex sentence: The "Forme of Cury" (Forms of Cooking, "cury" being from French') is an extensive recipe collection of the 14th century whose author is given as "the chief Master Cooks of King Richard II".
Split into simpler sentences: The "Forme of Cury" (Forms of Cooking, "cury" being from French') is an extensive recipe collection of the 14th century. Its authors are given as "the chief Master Cooks of King Richard II".