Question: The Vercelli Book is one of the oldest of the Old English Poetic Codices, one of the others being the Junius manuscript, is one of the how many major codices of Old English literature? 
Sentence (from "Vercelli Book"): The Vercelli Book is one of the oldest of the four Old English Poetic Codices (the others being the Junius manuscript, the Exeter Book, and the Nowell Codex).
Relevant evidence: Yes