Question: Name a codex written in Old English.
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P407 wd:Q42365 . ?sbj wdt:P31 wd:Q213924 } 
Answer: Lindisfarne Gospels, Bald's Leechbook, Nowell Codex, Vercelli Book, Book of Nunnaminster, Southwick Codex, St. Dunstan's Classbook, Homily on the Invention of the Cross, Liber Commonei, Ars Amatoria, Bosworth Psalter